Plants usually suffer drought stress during their growth process. As the photosynthetic activity center of plants, the leaf is the most sensitive organ under drought stress. In order to support the research on drought...Plants usually suffer drought stress during their growth process. As the photosynthetic activity center of plants, the leaf is the most sensitive organ under drought stress. In order to support the research on drought resistance of higher plants, this study reviewed the adaptation response and damage performance of epidermal structure, palisade tissue and spongy tissue, thickness, veins and stomata of plant leaves under drought stress.展开更多
Background Plant traits and plant adaptive strategies have been afected by the increasing intensity and severity of environmental changes.Given the uncertainty surrounding future environmental conditions,investigating...Background Plant traits and plant adaptive strategies have been afected by the increasing intensity and severity of environmental changes.Given the uncertainty surrounding future environmental conditions,investigating plant trait variations under various stresses is crucial for unraveling plant survival strategies.Leaf anatomical traits are closely responsible for plants’photosynthesis,respiration and transpiration.However,knowledge of how the multi-species leaf anatomical traits varied in extremely and moderately stressful environments is limited.Our objective was to compare the variation of leaf anatomic traits and adaptation strategies in two diferent stressful regions of the Qinghai-Tibet Plateau(TP)and Mongolian Plateau(MP)of China.Methods We sampled ten sites in each of the two regions(MP and TP)along an environmental gradient.Seven leaf anatomical traits and two leaf economic traits were measured for all leaf samples.Leaf anatomical traits include the traits related to leaf physiological processes(mesophyll thickness(MT),palisade tissue thickness(PT),spongy tissue thickness(ST),palisade-spongy tissue thickness ratio(PST)and epidermal thickness(ET))and the traits related to trait construction investment(epiderm-leaf thickness ratio(ET/LT)and mesophyll-leaf thickness ratio(MT/LT)).Leaf economic traits include specifc leaf area(SLA)and leaf nitrogen content(LN).Results The results revealed that leaf anatomical traits in the TP exhibited greater phylogenetic conservation with thicker structures,being less susceptible to environmental impacts than those in the MP.Additionally,the leaf anatomical and economic traits decoupled both in the MP and TP.Conclusion These fndings highlight that plants adopt diverse strategies to cope with extremely and moderately environmental stresses,but multidimensional trait patterns are generally favored in stressful environments.展开更多
[Objective] This study was conducted to compare leaf anatomical structure of Malus sieversii and M. robusta under different salt concentration levels to determine their tolerance to salt and thus to provide rootstock ...[Objective] This study was conducted to compare leaf anatomical structure of Malus sieversii and M. robusta under different salt concentration levels to determine their tolerance to salt and thus to provide rootstock materials for apple production in salinized soil in Southern Xinjiang. [Method] The experiment was conducted with M. sieversii and M. robusta as test materials. Salt stress was simulated using 8 g/L of NaCI solution, and Hoagland nutrient solution was used instead of NaCI solution as control group （CK）. Samples were collected on the 20^th d of treatment, sliced through paraffin processing. The prepared paraffin sections of M. sieversii and M. robusta were then observed under a light microscope for anatomical structures of leaf, upper epidermis, lower epidermis, palisade tissue and spongy tissue. [Result] Compared with the control, the leaf, upper epidermis, lower epidermis and spongy tissue of M. sieversii and M. robusta under salt stress were thickened at different degrees, while the thickness of the palisade tissue was decreased. Moreover, high salt concentration caused severer damage to the cell structure of M. sieversii than to that of M. robusta, as M. robusta cells maintained better structural integrity. [Conclusion] M. robusta has higher adaptability to salt stress than M. sieversii.展开更多
The anatomical features of leaves in 11 species of plantsgrowninatemperaturegradientandatemperature+CO_(2)gradient were studied.The palisade parenchyma thickness,the spongy parenchyma thickness and the total leaf thic...The anatomical features of leaves in 11 species of plantsgrowninatemperaturegradientandatemperature+CO_(2)gradient were studied.The palisade parenchyma thickness,the spongy parenchyma thickness and the total leaf thickness were measured and analyzed to investigate the effects of ele-vated temperature and CO_(2)on the anatomical characteristics of the leaves.Our results show that with the increase of temperature,the leaf thickness of C_(4)species increased while the leaf thickness of C_(3)species showed no constant changes.With increased CO_(2),seven out of nine C_(3)species exhibited increased total leaf thickness.In C_(4)species,leaf thickness decreased.As for the trend on the multi-grades,the plants exhibited linear or non-linear changes.With the increase of temperature or both temperature and CO_(2)for the 11 species investigated,leaf thickness varied greatly in different plants(species)and even in different branches on the same plant.These results demonstrated that the effect of increasing CO_(2)and temperature on the anatomical features of the leaves were species-specific.Since plant structures are correlated with plant functions,the changes in leaf anatomical characteristics in elevated temperature and CO_(2)may lead to functional differences.展开更多
基金Supported by the Scientific Research Innovation Fund for the Youth of Hunan Academy of Forestry(2013LQJ13)~~
文摘Plants usually suffer drought stress during their growth process. As the photosynthetic activity center of plants, the leaf is the most sensitive organ under drought stress. In order to support the research on drought resistance of higher plants, this study reviewed the adaptation response and damage performance of epidermal structure, palisade tissue and spongy tissue, thickness, veins and stomata of plant leaves under drought stress.
基金supported by the National Natural Science Foundation of China(No.32271611)the Qinling National Forest Ecosystem Research Station in 2020 fnanced by Ministry of Education of China
文摘Background Plant traits and plant adaptive strategies have been afected by the increasing intensity and severity of environmental changes.Given the uncertainty surrounding future environmental conditions,investigating plant trait variations under various stresses is crucial for unraveling plant survival strategies.Leaf anatomical traits are closely responsible for plants’photosynthesis,respiration and transpiration.However,knowledge of how the multi-species leaf anatomical traits varied in extremely and moderately stressful environments is limited.Our objective was to compare the variation of leaf anatomic traits and adaptation strategies in two diferent stressful regions of the Qinghai-Tibet Plateau(TP)and Mongolian Plateau(MP)of China.Methods We sampled ten sites in each of the two regions(MP and TP)along an environmental gradient.Seven leaf anatomical traits and two leaf economic traits were measured for all leaf samples.Leaf anatomical traits include the traits related to leaf physiological processes(mesophyll thickness(MT),palisade tissue thickness(PT),spongy tissue thickness(ST),palisade-spongy tissue thickness ratio(PST)and epidermal thickness(ET))and the traits related to trait construction investment(epiderm-leaf thickness ratio(ET/LT)and mesophyll-leaf thickness ratio(MT/LT)).Leaf economic traits include specifc leaf area(SLA)and leaf nitrogen content(LN).Results The results revealed that leaf anatomical traits in the TP exhibited greater phylogenetic conservation with thicker structures,being less susceptible to environmental impacts than those in the MP.Additionally,the leaf anatomical and economic traits decoupled both in the MP and TP.Conclusion These fndings highlight that plants adopt diverse strategies to cope with extremely and moderately environmental stresses,but multidimensional trait patterns are generally favored in stressful environments.
文摘[Objective] This study was conducted to compare leaf anatomical structure of Malus sieversii and M. robusta under different salt concentration levels to determine their tolerance to salt and thus to provide rootstock materials for apple production in salinized soil in Southern Xinjiang. [Method] The experiment was conducted with M. sieversii and M. robusta as test materials. Salt stress was simulated using 8 g/L of NaCI solution, and Hoagland nutrient solution was used instead of NaCI solution as control group （CK）. Samples were collected on the 20^th d of treatment, sliced through paraffin processing. The prepared paraffin sections of M. sieversii and M. robusta were then observed under a light microscope for anatomical structures of leaf, upper epidermis, lower epidermis, palisade tissue and spongy tissue. [Result] Compared with the control, the leaf, upper epidermis, lower epidermis and spongy tissue of M. sieversii and M. robusta under salt stress were thickened at different degrees, while the thickness of the palisade tissue was decreased. Moreover, high salt concentration caused severer damage to the cell structure of M. sieversii than to that of M. robusta, as M. robusta cells maintained better structural integrity. [Conclusion] M. robusta has higher adaptability to salt stress than M. sieversii.
文摘The anatomical features of leaves in 11 species of plantsgrowninatemperaturegradientandatemperature+CO_(2)gradient were studied.The palisade parenchyma thickness,the spongy parenchyma thickness and the total leaf thickness were measured and analyzed to investigate the effects of ele-vated temperature and CO_(2)on the anatomical characteristics of the leaves.Our results show that with the increase of temperature,the leaf thickness of C_(4)species increased while the leaf thickness of C_(3)species showed no constant changes.With increased CO_(2),seven out of nine C_(3)species exhibited increased total leaf thickness.In C_(4)species,leaf thickness decreased.As for the trend on the multi-grades,the plants exhibited linear or non-linear changes.With the increase of temperature or both temperature and CO_(2)for the 11 species investigated,leaf thickness varied greatly in different plants(species)and even in different branches on the same plant.These results demonstrated that the effect of increasing CO_(2)and temperature on the anatomical features of the leaves were species-specific.Since plant structures are correlated with plant functions,the changes in leaf anatomical characteristics in elevated temperature and CO_(2)may lead to functional differences.
