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Adaptation strategies of Cunninghamia lanceolata seedlings to light intensity gradients based on morpho-physiological trade-offs SCIE
期刊论文 | 2025 , 16 | FRONTIERS IN PLANT SCIENCE
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Introduction Cunninghamia lanceolata (Lamb.) Hook is a high-quality, fast-growing plantation-tree species widely distributed in southern China, and a commercial timber species unique to China that plays a vital role in meeting wood demand and maintaining ecological security. Although the morphological and physiological adaptations of C. lanceolata seedlings to light stress have been extensively documented separately, their interplay remains a critical gap in our knowledge and understanding of plant ecophysiology. Particularly, the synergistic mechanisms between phenotypic adaptations and metabolic regulation remain unclear.Methods This study employed 1-year-old, clonal, C. lanceolata seedlings as test materials to investigate the coordinated effects of different light intensity gradients (100%, 68%, 27%, 12%, and 5% of full sunlight) on the morphological and physiological responses.Results (1) Under decreasing light intensity, seedling height to diameter ratio and specific leaf area were 30.10% and 64.38% greater than of those recorded under 100% light intensity. The observed changes in growth maximized light capture capacity. Further, root growth, root to shoot ratio, and seedling quality index decreased with decreasing light intensity. (2) Leaf non-structural carbohydrate contents decreased significantly, along with key carbohydrate-metabolizing enzyme activities, and leaf carbon & ratio;nitrogen and carbon & ratio;phosphorus ratios. (3) High light intensities increased cytokinin and abscisic acid contents, whereas the lowest (5%) light intensity tested enhanced the accumulation of gibberellin, but had no significant effect on indoleacetic acid content.Discussion These results indicate that C. lanceolata seedlings used a dual adaptation strategy that combined "photoprotection under high light intensity" with "efficient resource utilization under low light intensity" through coordinated morphological and physiological adjustments. Our study provides a scientific basis for managing nursery light conditions and plantation light environment during early development of C. lanceolata seedlings. Specifically, we recommend a 68% light intensity for optimal seedling production.

Keyword :

light light morphological plasticity morphological plasticity non-structural carbohydrates non-structural carbohydrates physiological adjustments physiological adjustments plantation plantation

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GB/T 7714 Liu, Qingqing , Huang, Zhijun , Zou, Xianhua et al. Adaptation strategies of Cunninghamia lanceolata seedlings to light intensity gradients based on morpho-physiological trade-offs [J]. | FRONTIERS IN PLANT SCIENCE , 2025 , 16 .
MLA Liu, Qingqing et al. "Adaptation strategies of Cunninghamia lanceolata seedlings to light intensity gradients based on morpho-physiological trade-offs" . | FRONTIERS IN PLANT SCIENCE 16 (2025) .
APA Liu, Qingqing , Huang, Zhijun , Zou, Xianhua , Ma, Xiangqing , Liu, Bo . Adaptation strategies of Cunninghamia lanceolata seedlings to light intensity gradients based on morpho-physiological trade-offs . | FRONTIERS IN PLANT SCIENCE , 2025 , 16 .
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Effects of Light Intensity on Seedling Emergence and Early Growth of Liquidambar formosana Hance SCIE
期刊论文 | 2023 , 14 (5) | FORESTS
WoS CC Cited Count: 3
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Liquidambar formosana Hance is a common deciduous broad-leaved tree known for its fast growth rate and adaptability. However, excessive logging has substantially reduced the area of natural forest patches of L. formosana, and seedling regeneration is essential for the long-term continuation of L. formosana populations. To explore the effects of light intensity on the seedling emergence and early growth of L. formosana, a controlled experiment was conducted under three light-intensity treatments (20%, 60%, and 100% of full sunlight, i.e., the photosynthetic photon flux densities (PPFDs) were 223.93 +/- 7.54, 670.94 +/- 30.14, and 1119.61 +/- 23.19 mu mol center dot m (2) center dot s (1), respectively). The seedling emergence percentage, mean germination time, germination synchrony, vitality index, survival percentage, emergence index, morphological characteristics, and biomass allocation under different light intensities were analyzed. The seedling vitality index and survival percentage significantly differed among the treatments and were the lowest under 20% light intensity. With increased light intensity, the seedling mean germination time and germination synchrony increased and then decreased, and the opposite was true for the emergence index. With the increased light intensity, the seedling height, stem diameter, and root length significantly increased. The total, root, stem, and leaf biomasses reached maximum values under full sunlight. With the increased light intensity, the leaf biomass ratio increased, whereas the root biomass, stem biomass, and root-shoot ratios decreased. Our results indicated that the poor light environment under the canopy is not conducive to the survival and growth of L. formosana seedlings and may be among the primary reasons for low seedling establishment.

Keyword :

biomass allocation biomass allocation morphological plasticity morphological plasticity natural regeneration natural regeneration shading shading

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GB/T 7714 Chen, Hang , Wang, Lei , Guo, Si et al. Effects of Light Intensity on Seedling Emergence and Early Growth of Liquidambar formosana Hance [J]. | FORESTS , 2023 , 14 (5) .
MLA Chen, Hang et al. "Effects of Light Intensity on Seedling Emergence and Early Growth of Liquidambar formosana Hance" . | FORESTS 14 . 5 (2023) .
APA Chen, Hang , Wang, Lei , Guo, Si , Li, Mengqi , Tian, Zhifang , Han, Biao et al. Effects of Light Intensity on Seedling Emergence and Early Growth of Liquidambar formosana Hance . | FORESTS , 2023 , 14 (5) .
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Meta-Analysis of Effects of Forest Litter on Seedling Establishment SCIE
期刊论文 | 2022 , 13 (5) | FORESTS
WoS CC Cited Count: 13
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Litter plays an important role in seedling establishment (emergence, survival, and early growth). Here, we performed a meta-analysis on 404 datasets from 33 independent studies to analyze the effects of litter cover on seedling emergence, survival, height, and biomass (root, stem, leaf, and total). Each dataset was stratified according to experimental conditions, litter type (broadleaf versus needle litter), litter amount (thickness), and seed size. The results showed that litter cover had an overall negative effect on seedling emergence and survival, a neutral effect on root, leaf, total biomass, and a positive effect on stem biomass and seedling height than the no-litter cover control. Compared to thin (<250 g m(-2)) and medium (250-500 g m(-2)) litter layers, thick litter (>500 g m(-2)) was more detrimental for seedling emergence, survival, and total biomass, which could be an adaptation mechanism to prevent the growth of young seedling among high densities of other plants (trees). Broadleaf litter cover had a stronger negative effect on seedling emergence and total biomass than needle litter. Litter cover had a stronger negative effect on emergence of small seeds than on emergence of larger seeds. Similarly, litter cover had a stronger overall negative effect on seedling emergence than on seedling survival. In field and common garden experiments, litter effects were negative for emergence and positive for total biomass. In glasshouse and germination chamber experiments, litter effects were negative for emergence, survival and total biomass. These findings would contribute to advancements in forest management, improving conservation and restoration efforts.

Keyword :

litter thickness litter thickness litter type litter type plant biomass plant biomass seedling emergence seedling emergence seedling survival seedling survival seed size seed size

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GB/T 7714 Wang, Zhengning , Wang, Dayang , Liu, Qingqing et al. Meta-Analysis of Effects of Forest Litter on Seedling Establishment [J]. | FORESTS , 2022 , 13 (5) .
MLA Wang, Zhengning et al. "Meta-Analysis of Effects of Forest Litter on Seedling Establishment" . | FORESTS 13 . 5 (2022) .
APA Wang, Zhengning , Wang, Dayang , Liu, Qingqing , Xing, Xianshuang , Liu, Bo , Jin, Shaofei et al. Meta-Analysis of Effects of Forest Litter on Seedling Establishment . | FORESTS , 2022 , 13 (5) .
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Transcriptome Profiling of Stem-Differentiating Xylem in Response to Abiotic Stresses Based on Hybrid Sequencing in Cunninghamia lanceolata SCIE
期刊论文 | 2022 , 23 (22) | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
WoS CC Cited Count: 1
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Cunninghamia lanceolata (C. lanceolata) belongs to Gymnospermae, which are fast-growing and have desirable wood properties. However, C. lanceolata's stress resistance is little understood. To unravel the physiological and molecular regulation mechanisms under environmental stresses in the typical gymnosperm species of C. lanceolata, three-year-old plants were exposed to simulated drought stress (polyethylene glycol 8000), salicylic acid, and cold treatment at 4 degrees C for 8 h, 32 h, and 56 h, respectively. Regarding the physiological traits, we observed a decreased protein content and increased peroxidase upon salicylic acid and polyethylene glycol treatment. Superoxide dismutase activity either decreased or increased at first and then returned to normal under the stresses. Regarding the molecular regulation, we used both nanopore direct RNA sequencing and short-read sequencing to reveal a total of 5646 differentially expressed genes in response to different stresses, of which most had functions in lignin catabolism, pectin catabolism, and xylan metabolism, indicating that the development of stem-differentiating xylem was affected upon stress treatment. Finally, we identified a total of 51 AP2/ERF, 29 NAC, and 37 WRKY transcript factors in C. lanceolata. The expression of most of the NAC TFs increased under cold stress, and the expression of most of the WRKY TFs increased under cold and SA stress. These results revealed the transcriptomics responses in C. lanceolata to short-term stresses under this study's experimental conditions and provide preliminary clues about stem-differentiating xylem changes associated with different stresses.

Keyword :

abiotic stress abiotic stress Cunninghamia lanceolate Cunninghamia lanceolate nanopore long-read sequencing nanopore long-read sequencing stem-differentiating xylem stem-differentiating xylem transcription factors transcription factors

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GB/T 7714 Wei, Wentao , Wang, Huiyuan , Liu, Xuqing et al. Transcriptome Profiling of Stem-Differentiating Xylem in Response to Abiotic Stresses Based on Hybrid Sequencing in Cunninghamia lanceolata [J]. | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2022 , 23 (22) .
MLA Wei, Wentao et al. "Transcriptome Profiling of Stem-Differentiating Xylem in Response to Abiotic Stresses Based on Hybrid Sequencing in Cunninghamia lanceolata" . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 23 . 22 (2022) .
APA Wei, Wentao , Wang, Huiyuan , Liu, Xuqing , Kou, Wenjing , Liu, Ziqi , Wang, Huihui et al. Transcriptome Profiling of Stem-Differentiating Xylem in Response to Abiotic Stresses Based on Hybrid Sequencing in Cunninghamia lanceolata . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2022 , 23 (22) .
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Seed rain and soil seed bank in Chinese fir plantations and an adjacent natural forest in southern China: Implications for the regeneration of native species SCIE
期刊论文 | 2022 , 12 (1) | ECOLOGY AND EVOLUTION
WoS CC Cited Count: 6
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The natural regeneration of native broadleaved species underneath forest monoculture plantations is important to recover ecosystem functions and to mitigate adverse environmental effects. To understand how seed rain and soil seed bank facilitate natural regeneration, we surveyed their density and composition in a monoculture Chinese fir plantation, a mixed Chinese fir-broadleaf plantation, and an adjacent natural broadleaved forest for two years in southern China. Twenty-eight species (16 families) were in seed rain, and 45 species (27 families) were in soil seed bank. Seed rain density did not differ significantly across stands; however, the number of taxa in seed rain was highest in the mixed plantation and lowest in the natural forest. Seed bank density was significantly higher in the mixed plantation than in the other stands (p < .05). The Sorensen similarity index of species composition between seed sources and aboveground vegetation were relatively low (<.50). The seeds of various native tree species were common in the seed bank of the plantations, indicating that seed rain and seed bank played an important role in native forest regeneration. We recommend that managers interested in sustainable forestry should take into consideration the presence of existing soil seed bank when developing their management strategies. In addition, with regard to forest regeneration process, we also recommend supplementation of the species composition by direct seeding or planting of desired species.

Keyword :

afforestation afforestation conifers conifers ecological restoration ecological restoration mixed plantation mixed plantation Sorensen similarity index Sorensen similarity index subtropical forests subtropical forests

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GB/T 7714 Liu, Bo , Liu, Qingqing , Zhu, Chenxi et al. Seed rain and soil seed bank in Chinese fir plantations and an adjacent natural forest in southern China: Implications for the regeneration of native species [J]. | ECOLOGY AND EVOLUTION , 2022 , 12 (1) .
MLA Liu, Bo et al. "Seed rain and soil seed bank in Chinese fir plantations and an adjacent natural forest in southern China: Implications for the regeneration of native species" . | ECOLOGY AND EVOLUTION 12 . 1 (2022) .
APA Liu, Bo , Liu, Qingqing , Zhu, Chenxi , Liu, Zhigang , Huang, Zhijun , Tigabu, Mulualem et al. Seed rain and soil seed bank in Chinese fir plantations and an adjacent natural forest in southern China: Implications for the regeneration of native species . | ECOLOGY AND EVOLUTION , 2022 , 12 (1) .
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Phenotypic Plasticity of Cunninghamia lanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments SCIE
期刊论文 | 2022 , 13 (2) | FORESTS
WoS CC Cited Count: 3
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Effects of light quality on phenotypic plasticity in Cunninghamialanceolata (Lamb.) Hook. seedlings during growth and development, and the underlying mechanisms, were investigated. The seedlings showed distinct morphological adjustments when exposed to an equal photosynthetic photon flux density (400 mu mol.m(-2).s(-1)) of different light qualities: monochromatic blue (BL), monochromatic red (RL), monochromatic far-red (FrL), mixed RL and FrL at 1:1 (RFr1:1L), mixed RL and FrL at 1:2 (RFr1:2L), and multi-wavelength white (WL, control). Compared with WL, FrL and BL significantly promoted height increment. However, BL was unfavorable for root growth. The seedling biomass was lower and the root-to-shoot ratio was smaller under BL. RL promoted leaf area enlargement, root growth, axillary bud number, and increased the root-to-shoot ratio, but inhibited stem elongation. Low R/Fr ratios or increased FrL proportion increased seedling stem elongation. The seedling growth under RFr1:1L treatment was poorer than that under other treatments; however, the number of axillary buds was the highest. The plasticity of leaf morphology traits was lower in different treatments, and that of axillary bud traits was crucial in the adaptation of C. lanceolata to light quality. Precise management of light quality and wavelength in controlled environments may maximize the economic efficiency of forest production and enhance its quality.

Keyword :

leaf traits leaf traits light spectra light spectra red:far-red ratio red:far-red ratio root morphology root morphology seedling growth seedling growth stem elongation stem elongation

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GB/T 7714 Liu, Qingqing , Huang, Zhijun , Ma, Xiangqing et al. Phenotypic Plasticity of Cunninghamia lanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments [J]. | FORESTS , 2022 , 13 (2) .
MLA Liu, Qingqing et al. "Phenotypic Plasticity of Cunninghamia lanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments" . | FORESTS 13 . 2 (2022) .
APA Liu, Qingqing , Huang, Zhijun , Ma, Xiangqing , Tigabu, Mulualem , Xing, Xianshuang , Jin, Shaofei et al. Phenotypic Plasticity of Cunninghamia lanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments . | FORESTS , 2022 , 13 (2) .
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Plastic Responses in Growth, Morphology, and Biomass Allocation of Five Subtropical Tree Species to Different Degrees of Shading SCIE
期刊论文 | 2022 , 13 (7) | FORESTS
WoS CC Cited Count: 3
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We investigated how different degrees of shading affected growth, morphology, and biomass allocation in seedlings from two coniferous and three broadleaved species. The experiment was conducted in a shade house over a 1-year period. Our results showed that under increasing shade, seedlings from most species exhibited lower total biomass, net assimilation rates, relative growth rates, root mass ratios, and root/shoot ratios. In contrast, the slenderness quotients, leaf area ratios, and specific leaf areas increased with increasing shade. For coniferous species, growth traits were relatively more plastic (responsive to shade) than morphology or biomass allocation traits, whereas for broadleaved species, growth and biomass allocation were the most shade-sensitive traits. When comparing coniferous versus broadleaved species, the former had a higher growth plasticity index and lower allocation plasticity than the latter. Root biomass and stem mass ratio were the most and least plastic traits in response to shading. Our results indicate that shade differentially affects coniferous and broadleaved species in terms of their growth, morphology, and biomass allocation. These findings have important implications for the establishment and maintenance of mixed-species stands.

Keyword :

light adaptation light adaptation morphology morphology plasticity plasticity shade avoidance syndrome shade avoidance syndrome shade tolerance shade tolerance

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GB/T 7714 Huang, Zhijun , Liu, Qingqing , Tigabu, Mulualem et al. Plastic Responses in Growth, Morphology, and Biomass Allocation of Five Subtropical Tree Species to Different Degrees of Shading [J]. | FORESTS , 2022 , 13 (7) .
MLA Huang, Zhijun et al. "Plastic Responses in Growth, Morphology, and Biomass Allocation of Five Subtropical Tree Species to Different Degrees of Shading" . | FORESTS 13 . 7 (2022) .
APA Huang, Zhijun , Liu, Qingqing , Tigabu, Mulualem , Jin, Shaofei , Ma, Xiangqing , Liu, Bo . Plastic Responses in Growth, Morphology, and Biomass Allocation of Five Subtropical Tree Species to Different Degrees of Shading . | FORESTS , 2022 , 13 (7) .
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凋落物对杉木幼苗存活及早期生长的机械效应
期刊论文 | 2022 , 41 (09) , 1691-1699 | 生态学杂志
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凋落物覆盖对种子萌发及幼苗生长作用机制的研究多集中在物理作用和化感作用方面,机械作用机制尚缺乏系统研究。本研究以杉木已萌发种子为对象,通过室内控制实验研究3种凋落物类型(杉木、木荷、杉木和木荷1∶1混合(简称混合凋落物,下同))和4个覆盖厚度(对照,0 g·m~(-2);浅层,200 g·m~(-2);中层,400 g·m~(-2);深层,800 g·m~(-2))模拟不同凋落物覆盖条件对杉木幼苗存活和早期生长的机械效应。结果表明:(1)凋落物覆盖对已萌发种子的出苗率具有抑制作用。幼苗30 d的存活率总体表现为浅层促进,深层抑制的规律。出苗90 d后,混合凋落物深层覆盖和木荷凋落物中层和深层覆盖下已无幼苗存活。杉木凋落物中层和深层覆盖下的90 d存活率显著小于对照。(2)地径生长在杉木和混合凋落物覆盖下表现为浅层促进,深层抑制规律。根长生长随凋落物覆盖厚度的增加而降低,茎长则随覆盖厚度的增加而增加。与对照相比,杉木凋落物覆盖对幼苗苗高有促进作用,木荷和混合凋落物覆盖对苗高无明显影响。(3)杉木凋落物对总生物量的覆盖作用表现为浅层促进,中层不影响,深层抑制;混合凋落物浅层覆盖对总生物量无显著影响,中层覆盖有抑制作用;木荷浅层凋落物覆盖对总生物量有显著抑制作用。(4)根生物量比和根冠比随着凋落物厚度的增长逐渐减低。与对照相比,3种类型凋落物覆盖后叶生物量比和光合与非光合组织生物量比都显著增加,但不同覆盖厚度之间无显著差异。与对照相比,杉木凋落物浅层覆盖对粗壮度无显著影响,但中层和深层覆盖有显著抑制作用;木荷凋落物浅层覆盖对粗壮度有抑制作用。总体来看,凋落物机械作用对杉木幼苗生长的影响大小表现为:木荷凋落物>混合凋落物>杉木凋落物,即阔叶凋落物对杉木幼苗生长的影响最大。

Keyword :

凋落物 凋落物 早期生长 早期生长 机械作用 机械作用 生物量 生物量

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GB/T 7714 罗航 , 赵冲 , 王正宁 et al. 凋落物对杉木幼苗存活及早期生长的机械效应 [J]. | 生态学杂志 , 2022 , 41 (09) : 1691-1699 .
MLA 罗航 et al. "凋落物对杉木幼苗存活及早期生长的机械效应" . | 生态学杂志 41 . 09 (2022) : 1691-1699 .
APA 罗航 , 赵冲 , 王正宁 , 李梦琪 , 陈杭 , 陈雯雯 et al. 凋落物对杉木幼苗存活及早期生长的机械效应 . | 生态学杂志 , 2022 , 41 (09) , 1691-1699 .
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遮阴条件下杉木幼苗生长和C、N、P化学计量特征的变化
期刊论文 | 2022 , 46 (03) , 74-82 | 南京林业大学学报(自然科学版)
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【目的】比较不同强度遮阴条件下杉木(Cunninghamia lanceolata)幼苗生长、生物量积累与分配,以及不同器官碳(C)、氮(N)、磷(P)积累、分配及化学计量特征的差异,探讨杉木幼苗在不同遮阴条件下的C、N、P元素积累及分配的响应策略,揭示遮阴处理对杉木幼苗C、N、P元素变化规律的影响,为杉木苗木繁育、林分光照环境调控管理等提供参考。【方法】选取当年生杉木幼苗为研究对象,通过人工遮阴方式设置5个遮阴梯度,即0%(对照,不遮阴)、遮阴强度40%(透光率60%)、60%(透光率40%)、85%(透光率15%)和95%(透光率5%),持续观测1 a。试验结束后测定幼苗株高与地径增量、各器官生物量、根冠比、各器官C、N、P含量、积累量,并分析C、N、P化学计量特征(以C/N、C/P,N/P表示元素质量比)等指标。【结果】(1)随遮阴强度的增大,杉木幼苗株高增量总体呈现上升趋势,而地径增量则显著降低(P<0.05)。根、茎、叶及总生物量、根生物量占比和根冠比降低,茎、叶生物量比增大;(2)根、茎、叶中及总的C、N、P积累量随遮阴强度的增大而降低。随着遮阴强度的增大,杉木地上部分(茎和叶)C和N分配比例增加,而地下部分(根)C和N分配比例则降低。(3)杉木幼苗C/N和C/P变化趋势相同,随着遮阴强度的增大先增加后减少。杉木幼苗各器官N/P低于14,表明杉木幼苗在不同遮阴下的生长受到N限制。【结论】杉木幼苗生长和生理特性对不同遮阴强度响应有差异,主要表现在随着遮阴强度的增加,株高生长加快,地径粗生长减缓,生物量分配倾向于地上部分,幼苗由“矮粗”逐渐转变为“细高”。但是过度遮阴不利于杉木幼苗的生长,导致幼苗生物量积累减少,C、N、P积累量降低。

Keyword :

养分利用策略 养分利用策略 化学计量特征 化学计量特征 杉木幼苗 杉木幼苗 遮阴 遮阴

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GB/T 7714 刘青青 , 黄智军 , 马祥庆 et al. 遮阴条件下杉木幼苗生长和C、N、P化学计量特征的变化 [J]. | 南京林业大学学报(自然科学版) , 2022 , 46 (03) : 74-82 .
MLA 刘青青 et al. "遮阴条件下杉木幼苗生长和C、N、P化学计量特征的变化" . | 南京林业大学学报(自然科学版) 46 . 03 (2022) : 74-82 .
APA 刘青青 , 黄智军 , 马祥庆 , 王正宁 , 邢先双 , 刘博 . 遮阴条件下杉木幼苗生长和C、N、P化学计量特征的变化 . | 南京林业大学学报(自然科学版) , 2022 , 46 (03) , 74-82 .
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3种草本植物种子萌发及幼苗生长生理对干旱胁迫的响应
期刊论文 | 2022 , 51 (04) , 562-569 | 福建农林大学学报(自然科学版)
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以3种水保草本植物宽叶雀稗(Paspalum wettsteinii)、香根草(Vetiveria zizanioides)和狗牙根(Cynodon dactylon)种子和幼苗为材料,采用聚乙二醇(PEG-6000)溶液模拟水分胁迫方法,研究了不同干旱胁迫环境下(0、5%、10%、15%、20%、25%PEG)3种草本植物的种子萌发、幼苗生长以及抗氧化酶活性对干旱胁迫的响应.结果表明:PEG胁迫显著影响宽叶雀稗、香根草和狗牙根的种子萌发、幼苗生长以及保护酶活性.3种植物种子发芽率随PEG胁迫强度的增加而下降,低浓度PEG胁迫对3种植物种子发芽率的影响不显著,15%、20%PEG胁迫下发芽率虽然显著下降,但仍较高.随着胁迫浓度的提高,植物幼苗的根长、苗高和鲜重均显著下降,干旱胁迫显著影响植物幼苗的生长;25%PEG胁迫下,植物均表现出萌发失败或无根苗现象.随着胁迫时间的增加,各浓度处理3种植物幼苗的SOD活性均下降,胁迫处理后期POD活性增强,均在72 h后达到峰值,并显著高于其他处理(P<0.05).随着渗透势的增加,3种植物CAT活性峰值时间趋于提前.干旱胁迫下草本植物种子发芽率高、幼苗长势弱及保护酶活性调节力不足,势必增加种子库消耗和幼苗死亡数量,导致草本层生物多样性降低.

Keyword :

干旱胁迫 干旱胁迫 植被更新 植被更新 种子 种子 红壤 红壤 退化 退化

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GB/T 7714 文竹梅 , 冯玉超 , 刘青青 et al. 3种草本植物种子萌发及幼苗生长生理对干旱胁迫的响应 [J]. | 福建农林大学学报(自然科学版) , 2022 , 51 (04) : 562-569 .
MLA 文竹梅 et al. "3种草本植物种子萌发及幼苗生长生理对干旱胁迫的响应" . | 福建农林大学学报(自然科学版) 51 . 04 (2022) : 562-569 .
APA 文竹梅 , 冯玉超 , 刘青青 , 陈艳芳 , 陈云龙 , 刘博 et al. 3种草本植物种子萌发及幼苗生长生理对干旱胁迫的响应 . | 福建农林大学学报(自然科学版) , 2022 , 51 (04) , 562-569 .
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