Differences in ecophysiological responses of Populus euphratica females and males exposed to salinity and alkali stress

Yu, Lei; Tang, Shuanglei; Guo, Chengjin; Korpelainen, Helena; Li, Chunyang

doi:10.1016/j.plaphy.2023.107707

Cited by 11 publications

(4 citation statements)

References 70 publications

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“…Male P. euphratica had a higher carbon benefit in the Mid period. Although the C i of male P. euphratica was smaller in this period, male P. euphratica maintained higher P n through larger stomatal conductance [40,53]. The transpiration of P. euphratica was very strong in the Mid period, and WUE was significantly lower than that in the other two periods.…”

Section: Response Of Leaf Ecophysiology To Wettingmentioning

confidence: 79%

Foliar Water Uptake and Its Relationship with Photosynthetic Capacity and Anatomical Structure between Female and Male Populus euphratica at Different Growth Stages

Chen

Wang

et al. 2023

Forests

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Foliar water uptake (FWU) is considered to be a common phenomenon in most terrestrial plants. As a supplementary water source, it plays an important role in the growth and survival of plants in arid areas. However, there is no research to explain the water absorption of plant leaves from the perspective of gender specificity. To this end, we carried out a leaf water absorption capacity experiment and in situ wetting field experiment, respectively, in the early (Initial), middle (Mid) and end (End) of the growth season of male and female Populus euphratica. The results of the leaf water absorption capacity experiment showed that the FWU capacity of male and female P. euphratica showed an increasing trend with the growth period and reached the maximum at the End period. The FWU capacity of female P. euphratica was significantly greater than that of male P. euphratica after the Initial stage. The water absorption speed (k) of male and female leaves also increased with the growth period, but the increase was not significant. The increase in leaf water content per mg of water absorbed per unit of leaf area (LWCA) of male P. euphratica was always greater than that of female P. euphratica. Specific leaf area (SLA), leaf water saturated deficit (WSD) and water absorption parameters (FWU capacity, k) were significantly correlated. The results of the in situ wetting field experiment show that humidification significantly increased the predawn water potential (Mid period) of female and male P. euphratica leaves and the net photosynthetic rate (Mid period) of male P. euphratica leaves, but had no significant effect on chlorophyll fluorescence parameters and anatomical structure. The MFA results show that the water status of male and female P. euphratica leaves was significantly correlated with photosynthetic parameters, fluorescence parameters and anatomical parameters. Our results show that the foliar water uptake capacity of female P. euphratica leaves was stronger than that of male P. euphratica and shows significant dynamic changes during the growing season. This was because female P. euphratica has a developed water storage structure. Foliar water uptake can effectively improve the water status and photosynthetic capacity of male and female P. euphratica, and this improvement was more significant during the most intense period of soil water stress. These findings will deepen our understanding of the ecological adaptation of dioecious plants to foliar water uptake.

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Section: Response Of Leaf Ecophysiology To Wettingmentioning

confidence: 79%

Foliar Water Uptake and Its Relationship with Photosynthetic Capacity and Anatomical Structure between Female and Male Populus euphratica at Different Growth Stages

Chen

Wang

et al. 2023

Forests

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“…Generally, salt stress can decrease soil water potential and thus lead to osmotic stress in plants, as well as causing an imbalance of plant ion ratios and affecting the stability of the membrane system and enzyme activity [4][5][6]. Meanwhile, salinity can also affect the storage and allocation of photosynthetic products as well as secondary metabolites [7][8][9]. The storage of non-structural carbohydrates (NSCs), such as soluble sugars and starch, is the main substance involved in the energy metabolism of trees [10,11].…”

Section: Introductionmentioning

confidence: 99%

The Growth and Non-Structural Carbohydrate Response Patterns of Siberian Elm (Ulmus pumila) under Salt Stress with Different Intensities and Durations

Jiang,

Yang,

Zhang

et al. 2024

Forests

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(1) Background: Soil salinity is one of the major abiotic stresses that limits plant growth and production. However, the response patterns of plant growth and carbon metabolism to salt stress are still unclear. (2) Methods: We measured the relative growth rate, non-structural carbohydrate (NSC) concentrations and pool size across organs, the leaf mass area (LMA), root-to-shoot ratio, midday leaf water potential (Ψmd), and photosynthetic characteristics of elm seedlings planted in the field under different salt stress intensities and durations. (3) Results: Salt stress can reduce the photosynthesis rate, stomatal conductance, and Ψmd and inhibit the growth of elm species. LMA increased with the degree and duration of salt stress, indicating an increase in leaf carbon investment to resist salt stress. The root-to-shoot ratio decreased under salt stress to reduce salt absorption by the roots. In the early stage of stress, the concentrations of starch and total NSCs in all organs increased to improve stress resistance and the survival of plants. In the late stage of stress, the concentration of NSCs in the root decreased, which could restrict root growth and water uptake. The relationships between NSC concentration and growth in different organs were contrasting. Meanwhile, the pool size of NSCs had a more significant impact on growth than their concentration. Moreover, the pool size of NSCs in below-ground organs is more closely related to growth than that of above-ground organs. (4) Conclusions: Our research elucidates the carbon allocation mechanism across organs under different salt stress intensities and durations, providing theoretical support for understanding the relationship between tree growth and carbon storage under salt stress.

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“…E. ulmoides contains a specific white filamentous material, gutta-percha gum, which is extensively used in various fields of life ( Liu et al., 2022 ; Zhao et al., 2023 ). Under the global climate change situation, the growth and development of trees are increasingly threatened by drought and salt stress ( Polle and Chen, 2015 ; Choat et al., 2018 ; McDowell et al., 2020 ; Yu et al., 2023 ). Recent researches on the response of E. ulmoides to salt and drought stress mainly focus on the morphology, physiology and molecular biology ( Wang et al., 2018 ; Li et al., 2019 ; Zuo et al., 2022 ), however, its response patterns of NSCs and its composition under stress is still not clear.…”

Section: Introductionmentioning

confidence: 99%

Growth and non-structural carbohydrates response patterns of Eucommia ulmoides under salt and drought stress

Zhang,

Qin,

Kan

et al. 2024

Front. Plant Sci.

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IntroductionSalinity and droughts are severe abiotic stress factors that limit plant growth and development. However, the differences and similarities of non-structural carbohydrates (NSCs) responses patterns of trees under the two stress conditions remain unclear.MethodsWe determined and compared the growth, physiology, and NSCs response patterns and tested the relationships between growth and NSCs concentrations (or pool size) of Eucommia ulmoides seedlings planted in field under drought and salt stress with different intensities and durations.Results and discussionWe found that drought and salt stress can inhibit the growth of E. ulmoides, and E. ulmoides tended to enhance its stress resistance by increasing proline concentration and leaf thickness or density but decreasing investment in belowground biomass in short-term stress. During short-term drought and salt stress, the aboveground organs showed different NSCs response characteristics, while belowground organs showed similar change characteristics: the starch (ST) and NSCs concentrations in the coarse roots decreased, while the ST and soluble sugar (SS) concentrations in the fine roots increased to enhance stress resistance and maintain water absorption function. As salt and drought stress prolonged, the belowground organs represented different NSCs response patterns: the concentrations of ST and SS in fine roots decreased as salt stress prolonged; while ST in fine roots could still be converted into SS to maintain water absorption as drought prolonged, resulting in an increase of SS and a decrease of ST. Significant positive relationships were found between growth and the SS and total NSCs concentrations in leaves and branches, however, no significant correlations were found between growth and below-ground organs. Moreover, relationships between growth and NSCs pool size across organs could be contrast.ConclusionOur results provide important insights into the mechanisms of carbon balance and carbon starvation and the relationship between tree growth and carbon storage under stress, which were of great significance in guiding for the management of artificial forest ecosystem under the context of global change.

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Differences in ecophysiological responses of Populus euphratica females and males exposed to salinity and alkali stress

Cited by 11 publications

References 70 publications

Foliar Water Uptake and Its Relationship with Photosynthetic Capacity and Anatomical Structure between Female and Male Populus euphratica at Different Growth Stages

Foliar Water Uptake and Its Relationship with Photosynthetic Capacity and Anatomical Structure between Female and Male Populus euphratica at Different Growth Stages

The Growth and Non-Structural Carbohydrate Response Patterns of Siberian Elm (Ulmus pumila) under Salt Stress with Different Intensities and Durations

Growth and non-structural carbohydrates response patterns of Eucommia ulmoides under salt and drought stress

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