Distinct fine‐root responses to precipitation changes in herbaceous and woody plants: a meta‐analysis

Wang, Peng; Huang, Kailing; Hu, Shuijin

doi:10.1111/nph.16266

Cited by 84 publications

(59 citation statements)

References 57 publications

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“…This adaptation mechanism of plants for the adverse environment is consistent with the reality [24]. The herbaceous plants were more vulnerable to drought stress than woody plants duo to their shallow root distribution and inaccessibility to deep water [25,26]. The results in this study display that the herbaceous plants in the cultivated soil have higher leaf IWHC, WTR and water contents, as compared to the woody plants in the moderate rocky desertification soil.…”

Section: Discussionsupporting

confidence: 86%

New sight: rapid monitor of intracellular water information in plant leaves based on electrophysiological parameters

Zhang

Su³

et al. 2020

Preprint

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Background: Intracellular water in plant leaves is paramount importance to physiological and biochemical processes. Water changes trigger the rapid response of plant electrophysiological information. In this study, plant electrophysiological information was firstly used to rapid monitor intracellular water information in plant leaves. Results: Based on the thermodynamics laws, the fitting equations between plant electrophysiological parameters and clamping force were innovative established. Subsequently, leaf intrinsic electrophysiological parameters, intracellular water-holding capacity (IWHC), water use efficiency (IWUE), water-holding time (IWHT) and water transfer rate (WTR), were firstly developed and applied. The results show that the leaves of Broussonetia papyrifera in the cultivated soil had higher IWHC, WTR and water content than in the moderate rocky desertification soil. The leaf IWHC, WTR and water content of the herbaceous plants were higher than that of the woody plants. Solanum tuberosum had higher leaf IWHC, WTR and lower IWUE, IWHT, as compared to Capsicum annuum. Conclusions: These indexes strongly reveal the life phenomenon of the intracellular water metabolism in plant leaves. This study highlights that the online electrophysiological parameters promise a new sight for intracellular water metabolism in plants.

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Section: Discussionsupporting

confidence: 86%

New sight: rapid monitor of intracellular water information in plant leaves based on electrophysiological parameters

Zhang

Su³

et al. 2020

Preprint

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“…Similarly, responses of root biomass and R a to precipitation change were negatively asymmetrical. Drought has been found to inhibit root production and increase root mortality in grasslands (Wang et al., 2020; Wilcox et al., 2017), which not only directly suppressed R a , but also inhibited R h through the reduction in root exudates (Zhang, Li, et al, 2019). However, high precipitation could relieve water restriction and decrease C allocation to belowground in grasslands, leading to a nonsignificant response of root biomass (Figure 5d).…”

Section: Discussionmentioning

confidence: 99%

“…In comparison with herbaceous plants, trees have deeper rooting depth (Canadell et al., 1996), and soil water can be redistributed from wet deep layers to dry surface layers through their root system by hydraulic lift (Prieto, Armas, & Pugnaire, 2012). Therefore, R s in forests may be more buffered from drought than that in grasslands (Davidson, Nepstad, Ishida, & Brando, 2008; Wang, Huang, & Hu, 2020). In addition, fine‐textured soils with good water holding capacity in most forests could weaken the effect of water stress from precipitation reduction on microbial and root activities (Liu, Liu, et al, 2016; Shi, Cheng, Liu, & Jiang, 2005), leading to neutral (Brando et al., 2008; Davidson, Ishida, & Nepstad, 2004; Davidson et al., 2008) or even positive (Cleveland, Wieder, Reed, & Townsend, 2010; Liu, Liu, et al, 2016) responses of R s to drought.…”

Section: Introductionmentioning

confidence: 99%

The response of soil respiration to precipitation change is asymmetric and differs between grasslands and forests

Wang

et al. 2020

Global Change Biology

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Intensification of the Earth's hydrological cycle amplifies the interannual variability of precipitation, which will significantly impact the terrestrial carbon (C) cycle. However, it is still unknown whether previously observed relationship between soil respiration (Rs) and precipitation remains applicable under extreme precipitation change. By analyzing the observations from a much larger dataset of field experiments (248 published papers including 151 grassland studies and 97 forest studies) across a wider range of precipitation manipulation than previous studies, we found that the relationship of Rs response with precipitation change was highly nonlinear or asymmetric, and differed significantly between grasslands and forests, between moderate and extreme precipitation changes. Response of Rs to precipitation change was negatively asymmetric (concave‐down) in grasslands, and double‐asymmetric in forests with a positive asymmetry (concave‐up) under moderate precipitation changes and a negative asymmetry (concave‐down) under extreme precipitation changes. In grasslands, the negative asymmetry in Rs response was attributed to the higher sensitivities of soil moisture, microbial and root activities to decreased precipitation (DPPT) than to increased precipitation (IPPT). In forests, the positive asymmetry was predominantly driven by the significant increase in microbial respiration under moderate IPPT, while the negative asymmetry was caused by the reductions in root biomass and respiration under extreme DPPT. The different asymmetric responses of Rs between grasslands and forests will greatly improve our ability to forecast the C cycle consequences of increased precipitation variability. Specifically, the negative asymmetry of Rs response under extreme precipitation change suggests that the soil C efflux will decrease across grasslands and forests under future precipitation regime with more wet and dry extremes.

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“…This proposed plant adaptation mechanism under adverse environments is consistent with a previous study [ 31 ]. Herbaceous plants are more vulnerable to drought stress than woody plants, due to their shallow root distribution and inability to access deep water [ 32 , 33 ]. The results of this study showed that herbaceous plants grown in agricultural soil had higher leaf IWHC, WTR and water contents than the woody plants grown in moderately rocky desertified soil.…”

Section: Discussionmentioning

confidence: 99%

A Plant’s Electrical Parameters Indicate Its Physiological State: A Study of Intracellular Water Metabolism

Zhang

et al. 2020

Plants

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Almost all of a plant’s life activities involve electrochemical reactions. Plant electrical parameters respond quickly to environmental changes and are closely related to physiological activities. In this study, the theoretical intrinsic relationships between clamping force and leaf impedance (Z) or capacitive reactance (Xc) and capacitance (C) were revealed as 3-parameter exponential decay and linear models based on bioenergetics, respectively, for the first time. Leaf electrical characteristics including intrinsic impedance (IZ), capacitive reactance (IXc), capacitance (IC) and specific effective thickness (d) were successfully detected using the above-mentioned relationships and were used to manifest plant metabolic activity. The intracellular water-holding capacity (IWHC), water-use efficiency (IWUE), water-holding time (IWHT) and water transfer rate (WTR) of plant leaves were defined on the basis of IZ, IXc, IC and d, and applied to reflect the intracellular water metabolism. The results demonstrated that the leaves of Broussonetia papyrifera plants grown in agricultural soil had higher IC, d, IWHC, WTR, water content values and lower IZ, IXc values than those grown in moderately rocky desertified soil. The leaf IC, d, IWHC, WTR and water content values of herbaceous plants were higher than those of woody plants. Solanum tuberosum L. had higher leaf IC, d, IWHC and WTR values, but exhibited lower IZ, IXc, IWUE and IWHT values than Capsicum annuum L. This study highlighted that a plant’s electrical parameters based on bioenergetics clearly indicate its physiological process—e.g., the intracellular water metabolism.

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Distinct fine‐root responses to precipitation changes in herbaceous and woody plants: a meta‐analysis

Cited by 84 publications

References 57 publications

New sight: rapid monitor of intracellular water information in plant leaves based on electrophysiological parameters

New sight: rapid monitor of intracellular water information in plant leaves based on electrophysiological parameters

The response of soil respiration to precipitation change is asymmetric and differs between grasslands and forests

A Plant’s Electrical Parameters Indicate Its Physiological State: A Study of Intracellular Water Metabolism

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