Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila)

Wu, Ya Juan; Cai, Ren; Tian, Yun; Zha, Tian Shan; Liu, Peng; Bai, Yu; Yong, Jing; Lai, Zong Rui; Bourque, Charles P.‐A.

doi:10.1016/j.ecolind.2018.06.040

Cited by 23 publications

(25 citation statements)

References 76 publications

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“…Drought days in 2019 were defined as those days with daily mean SWC < 0.1 m 3 m −3 [9,26,36]. The average dates for the onset and end of the growing season were set at early May and end of September.…”

Section: Discussionmentioning

confidence: 99%

“…The measurements were taken from plants enclosed within three 5 × 5 m 2 plots. Three individuals of both A. ordosica and L. secalinus were randomly selected in each plot (n = 9) assigned for in situ measurements [26,34,35]. Photosynthesis was measured on fully developed leaves on the south-facing side of each assigned plant individuals, every 10 days from May to September 2019.…”

Section: Photosynthesis Gas-exchange Measurementsmentioning

confidence: 99%

“…Plant ecosystem health in arid and semiarid areas is rapidly deteriorating as water shortages become more frequent [26]. Responses of plant communities to environmental change are typically regulated by the dominant species in the community [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…These communities are widespread throughout the semiarid regions of the Mu Us Desert [30]. Their sustainability and presence, however, are being greatly affected by severe limitations in available soil water emergent in many parts of the desert complex [26,31].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Changes in Plant Resource Use Efficiencies and Their Primary Influence Mechanisms in a Typical Desert Shrub Community

Jiang

Tian

Zha

et al. 2021

Forests

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Understanding plant resource use efficiencies (RUEs) and their tradeoffs in a desert shrub community, particularly as it concerns the usage of water, light, and nitrogen, remains an ecological imperative. Plant RUEs have been widely used as indicators to understand plant acclimation processes to unfavorable environmental conditions. This study aimed to examine seasonal dynamics in RUEs in two widely distributed plant species in a typical desert shrub community (i.e., Artemisia ordosica and Leymus secalinus) based on in-situ measurements of leaf photosynthesis, specific leaf area (SLA), leaf nitrogen concentration (i.e., Nmass + Narea), and several site-related abiotic factors. Both species exhibited significant seasonal variation in RUEs, with a coefficient of variation (CV) > 30% and seasonal divergence among the various RUEs. Seasonal divergence was largely controlled by variation in stomatal conductance (Gs), which was in turn influenced by variation in soil water content (SWC) and water vapor pressure deficit (VPD). RUEs between species converged, being positively correlated, yielding: (i) r2 = 0.40 and p < 0.01 for WUE; (ii) r2 = 0.18 and p < 0.01 for LUE；and (iii) r2 = 0.25 and p < 0.01 for NUE. RUEs for A. ordosica were mostly larger than those for L. secalinus, but less reactive to drought. This suggests A. ordosica was more conservative in its usage of available resources and was, therefore, better able to adapt to arid conditions. Resource use strategies between species differed in response to drought. Desert shrubs are projected to eventually replace grasses, as drought severity and duration increase with sustained regional climate change.

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Section: Discussionmentioning

confidence: 99%

Section: Photosynthesis Gas-exchange Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Changes in Plant Resource Use Efficiencies and Their Primary Influence Mechanisms in a Typical Desert Shrub Community

Jiang

Tian

Zha

et al. 2021

Forests

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“…The minimum drought‐induced F v /F m values that will allow a successful recovery varies between species. Resurrection plants can recover the photosynthetic activity after a complete desiccation and F v /F m values of 0, as it is described in Boea hygrometrica (Tan et al ); the xerophytic species Salix psammophila can survive values near 0.3 (Wu et al ) and the subalpine Ramonda myconi reached values of 0.49 under freezing conditions (Fernández‐Marín et al ); Mediterranean species are also adapted to drought stress, as Cistus albidus reached values around 0.6 during summer (Brossa et al ) and recovered after rewatering. Hence, the limit of the photosystems efficiency can provide very valuable information on the resistance to a given stress, especially within the framework of future climate projections.…”

Section: Introductionmentioning

confidence: 90%

Strategies for severe drought survival and recovery in a Pyrenean relict species

Cotado

Munné‐Bosch

Pintó‐Marijuan

2020

Physiologia Plantarum

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In the context of future climate change new habitats will be threatened and unique species will be forced to develop different strategies to survive. Saxifraga longifolia Lapeyr. is an endemic species from the Pyrenees with a very particular habitat. We explored the capacity and strategies of S. longifolia plants to face different severities of drought stress under both natural conditions and controlled water stress followed by a re‐watering period of 20 days. Our results showed a role for abscisic acid (ABA), salicylic acid (SA) and cytokinins (CKs) in plant survival from drought stress, and as the stress increased, ABA lost significance and SA appeared to be more associated with the response mechanisms. Moreover, photo‐oxidative stress markers revealed that both xanthophyll cycles played a photoprotection role with a stronger participation of the lutein epoxide cycle as the stress was more intense. Severe drought decreased the maximum efficiency of photosystem II (Fv/Fm) below 0.45, being this the limit to survive upon rewatering. Overall, our results proved different strategies of S. longifolia plants to cope with drought stress and suggested a Fv/Fm threshold to predict plant survival in high‐mountain environments.

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Pilocarpus microphyllus seedling growth threatened by climate change: an ecophysiological approach

Amaral

Pezzopane

Júnior

et al. 2021

Theor Appl Climatol

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Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila)

Cited by 23 publications

References 76 publications

Dynamic Changes in Plant Resource Use Efficiencies and Their Primary Influence Mechanisms in a Typical Desert Shrub Community

Dynamic Changes in Plant Resource Use Efficiencies and Their Primary Influence Mechanisms in a Typical Desert Shrub Community

Strategies for severe drought survival and recovery in a Pyrenean relict species

Pilocarpus microphyllus seedling growth threatened by climate change: an ecophysiological approach

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