Higher association and integration among functional traits in small tree than shrub in resisting drought stress in an arid desert

Yang, Xiaodong; Anwar, Elhamjan; Zhou, Jie; He, Duanwei; Gao, Yong-Chao; Lv, Guanghui; Cao, Yunxia

doi:10.1016/j.envexpbot.2022.104993

Cited by 32 publications

(24 citation statements)

References 78 publications

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“…In this study, stoma density and size, stem xylem anatomy (vessel diameter and density), Huber value, instantaneous water conductivity ( K wb ) of branches, leaf specific hydraulic conductance ( K l ), and transpiration traits [transpiration rate and stomatal conductance (Tr and Cond)] were used as proxies for water transport capacity. These indicators were chosen as proxies because of two aspects: the power source of water transport or its direct influence on the water transport process from stem to leaf ( Poorter et al., 2010b ; Yang et al., 2022b ) ( Table 2 ).…”

Section: Methodsmentioning

confidence: 99%

“…The Cond and Tr were the maximum values of the three types of heteromorphic leaves in our experimental sites as the local maximum light intensity, optimum temperature, and CO 2 concentration for plant growth in vigorous growing period (mid-July) were used in the measurements. It is worth noting that such treatment eliminated the influences of seasonal and microenvironmental changes in photosynthetic traits on our research purposes ( Yang et al., 2022b ).…”

Section: Methodsmentioning

confidence: 99%

“…As plants grow taller, the increases of the gravitational potential between soil and the top of the canopy and the frictional resistance of water flow in xylem would enlarge the leaf-to-atmosphere vapor pressure deficit (leaf-to-air VPD) and thus increase xylem tension ( Koch et al., 2004 ; Ryan et al., 2006 ; Yang et al., 2019a ) . The progressive drop in xylem pressure can trigger embolism, which then result in plant hydraulic dysfunction ( Ryan and Yoder, 1997 ; Mcdowell et al., 2010 ; Yang et al., 2022b ). To reduce the risk of xylem embolism caused by increased height, plants usually improve their water transport capacity while reducing ineffective water loss to alleviate hydraulic constraints via the adjustment of water-related functional traits ( Diaconu et al., 2016 ; Garcia et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…It is known that drought stress increases the risk of xylem embolism, making plants from water-limited environments more prone to hydraulic dysfunction relative to those inhabiting water abundance-rich environments ( Christian, 2019 ; Garcia et al., 2021 ). In order to reduce the extra hydraulic constraints caused by drought stress, adjustment of leaf morphology of P. euphratica may be more drastic than that of other plants ( Zhuang et al., 2011 ; Liu et al., 2015 ; Yang et al., 2022b ). A dramatic result is an obvious change in leaf shape ( Li et al., 2019 ; Zhai et al., 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Hydraulic constraints determine the distribution of heteromorphic leaves along plant vertical height

Yang

Anwar²,

Xu³

et al. 2022

Front. Plant Sci.

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As an interesting and important trait of some drought-tolerant species, heteromorphic leaves are distributed differentially along plant vertical heights. However, the underpinning mechanism for the formation of heteromorphic leaves remains unclear. We hypothesize that heteromorphic leaves are caused by the hydraulic constraints possibly due to the compensation of the changes in functional traits in response to water transport capacity or the reduction of ineffective water loss. In this study, differences in water transport capacity, morphological traits, anatomical structures, and cellular water relations among three typical types of heteromorphic leaves (i.e., lanceolate, ovate, and broad-ovate) of Populus euphratica Oliv. (a dominant species of desert riparian forest in Central and West Asia) and their relationships were analyzed in order to explore the forming mechanism of heteromorphic leaves. The results showed that the lanceolate, ovate, and broad-ovate leaves were growing in the lower, intermediate, and higher positions from the ground, respectively. Morphological traits, anatomical structures, cellular water relations, and water transport capacity significantly varied among the three types of heteromorphic leaves (P< 0.01). Drought stress in broad-ovate leaves was significantly higher than that in ovate and lanceolate leaves (P< 0.01). Water transport capacity has significant correlations with morphological traits, anatomical structures, and cellular water relations (R2 ≥ 0.30; P< 0.01). Our results indicated that heteromorphic leaves were used as an important adaptive strategy for P. euphratica to alleviate the increase of hydraulic constraints along vertical heights.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydraulic constraints determine the distribution of heteromorphic leaves along plant vertical height

Yang

Anwar²,

Xu³

et al. 2022

Front. Plant Sci.

Self Cite

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“…However, most of these studies have focused on forests and grassland ecosystems in moist regions, while few studies have been carried out in arid deserts ( Hautier et al, 2020 ; Wang C. et al, 2021 ; Qiao et al, 2022 ). It is well known that one of the most striking features of desert ecosystems, that distinguishes them from other systems, is that local plants are subjected to severe drought stress due to the lack of rainfall ( Gong et al, 2019 ; Song et al, 2020 ; Yang X. et al, 2022 ). In this case, the relationship between diversity and community stability in arid desert may be different from other systems.…”

Section: Introductionmentioning

confidence: 99%

Different contributions of plant diversity and soil properties to the community stability in the arid desert ecosystem

et al. 2022

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As a one of the focuses of ecological research, understanding the regulation of plant diversity on community stability is helpful to reveal the adaption of plant to environmental changes. However, the relationship between plant diversity and community stability is still controversial due to the scale effect of its influencing factors. In this study, we compared the changes in community stability and different plant diversity (i.e., species, functional, and phylogenetic diversities) between three communities (i.e., riparian forest, ecotone community, and desert shrubs), and across three spatial scales (i.e., 100, 400, and 2500 m2), and then quantified the contribution of soil properties and plant diversity to community stability by using structural equation model (SEM) in the Ebinur Lake Basin Nature Reserve of the Xinjiang Uygur Autonomous Region in the NW China. The results showed that: (1) community stability differed among three communities (ecotone community > desert shrubs > riparian forest). The stability of three communities all decreased with the increase of spatial scale (2) species diversity, phylogenetic richness and the mean pairwise phylogenetic distance were higher in ecotone community than that in desert shrubs and riparian forest, while the mean nearest taxa distance showed as riparian forest > ecotone community > desert shrubs. (3) Soil ammonium nitrogen and total phosphorus had the significant direct negative and positive effects on the community stability, respectively. Soil ammonium nitrogen and total phosphorus also indirectly affected community stability by adjusting plant diversity. The interaction among species, functional and phylogenetic diversities also regulated the variation of community stability across the spatial scales. Our results suggested that the effect of plant diversities on community stability were greater than that of soil factors. The asynchronous effect caused by the changes in species composition and functional traits among communities had a positive impact on the stability. Our study provided a theoretical support for the conservation and management of biodiversity and community functions in desert areas.

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Mutual feedback mechanisms between functional traits and soil nutrients drive adaptive potential of tiger nuts (Cyperus esculentus L.) in marginal land

Tan

et al. 2023

Plant Soil

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Higher association and integration among functional traits in small tree than shrub in resisting drought stress in an arid desert

Cited by 32 publications

References 78 publications

Hydraulic constraints determine the distribution of heteromorphic leaves along plant vertical height

Hydraulic constraints determine the distribution of heteromorphic leaves along plant vertical height

Different contributions of plant diversity and soil properties to the community stability in the arid desert ecosystem

Mutual feedback mechanisms between functional traits and soil nutrients drive adaptive potential of tiger nuts (Cyperus esculentus L.) in marginal land

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