Improved drought resistance by intergeneric graftingin Salicaceae plants under water deficits

Han, Qingquan; Luo, Jianxun; Li, Zhijun; Korpelainen, Helena; Li, Chunyang

doi:10.1016/j.envexpbot.2018.07.003

Cited by 11 publications

(9 citation statements)

References 78 publications

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“…Net photosynthetic rate and stomatal conductance are indicators of drought tolerance. Drought stress significantly reduces the net photosynthetic rate, but the drought‐resistant species showed less decrease (Han, Luo, Li, Korpelainen, & Li, ; Xu, Peng, et al, ; Xu, Yang, et al, ; Zhang et al, , 2014). In our study, under well‐watered conditions, S. paraplesia females did not display a significantly higher photosynthetic capacity than males to compensate the higher cost of reproduction in females (Obeso, ).…”

Section: Discussionmentioning

confidence: 99%

Sexually differential tolerance to water deficiency of Salix paraplesia—A female‐biased alpine willow

Liao

Song

Tang

et al. 2019

Ecology and Evolution

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Salicaceae plants are dioecious woody plants. Previous studies have shown that male individuals are more tolerant to water deficiency than females for male‐biased poplars. However, Salix paraplesia is a female‐biased species in nature. It is still unknown whether female willows are more tolerant to drought stress than males. To better understand the sexually different tolerance to water deficiency in willows, a greenhouse experiment combined with a field investigation was conducted, and physiological traits were tested in male and female S. paraplesia under a drought‐stressed condition (50% of soil water capacity). Our field investigation showed that S. paraplesia was a species with female‐biased sex ratio along altitude gradients (2,400 m, 2,600 m and 2,800 m) in their natural habitats. Our results showed that the height growth, biomass accumulation, total chlorophyll pigment content ( TChl ), and the net photosynthetic rate were higher in female willows than in males at the low and middle altitudes (2,400 m and 2,600 m) rather than at a high altitude (2,800 m) under well‐watered conditions. Under drought‐stressed conditions, the growth, biomass, and photosynthesis were greatly inhibited in both sexes, while females showed higher biomass and TChl content and suffered less negative effects than did males. Particularly, females that originated from a high altitude showed lower leaf relative electrolyte leakage, malondialdehyde content, and less disorder of chloroplast ultrastructures but a higher peroxidase activity (POD) than that of males. Therefore, S. paraplesia females exhibited a better drought tolerance and self‐protective ability than males from high altitude. There is a reason to speculate that the population structure of S. paraplesia at a high altitude would be likely to further female biases with the increased drought intensity in the alpine regions.

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Section: Discussionmentioning

confidence: 99%

Sexually differential tolerance to water deficiency of Salix paraplesia—A female‐biased alpine willow

Liao

Song

Tang

et al. 2019

Ecology and Evolution

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“…NSCs changes in trees under different drought durations are particularly important mechanisms by which trees adapt to drought. Although there have been studies on the changes in NSCs of multiple species under drought (Dickman et al, 2019; O'Brien, Burslem, & Caduff, 2015), most of the previous studies have focused on the changes in NSCs in a single species and not all organs of trees over time, and some of them used short‐term drought treatments and compared the initial and final NSC concentrations, neglecting the plants’ NSC general patterns and the NSC distribution in each organ over time (Adams et al, 2015; Gricar, Zavadlav, & Jyske, 2018; Han, Luo, & Li, 2018; Ivanov et al, 2018; Lin, Zheng, & Huang, 2018; Regier, Streb, & Zeeman, 2010; Rodríguez‐Calcerrada et al, 2016; Trifilò et al, 2017; Zhang, Cao, & Chen, 2015). Therefore, studying the dynamics of NSC content in trees and NSC distribution patterns in different organs under drought caused by global climate change is helpful in understanding the influence of drought.…”

Section: Introductionmentioning

confidence: 99%

Patterns in nonstructural carbohydrate contents at the tree organ level in response to drought duration

Liu

Yang

et al. 2020

Global Change Biology

112

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Nonstructural carbohydrates (NSCs) facilitate the adaptation of trees to drought stress. There have been a large number of studies exploring NSC changes in individual plant species and individual organ under drought and showed different trends; however, an understanding of the universal pattern of the plant NSCs responses to drought, particularly to drought duration, is still lacking. Here, we compiled data from 47 experimental studies on 52 tree species and conducted a meta‐analysis to evaluate the responses of soluble sugars, starch, and TNSC (total nonstructural carbohydrates including both soluble sugars and starch) concentrations in different tree organs (leaf, stem, and root) to drought intensity and duration. We found that starch in all organs decreased and soluble sugars in leaf increased with prolonged experiment time, and the changes in soluble sugars in all organs were stronger under severe drought than under slight‐to‐moderate drought. Under slight‐to‐moderate drought, the NSC content of each organ varied with time, while with the extension of the drought duration, the NSCs gradually approached the control value (no drought stress); this trend remained in the late drought, which means that trees activated physiological regulation processes to increase carbon storage and reduce the risks of carbon starvation. In contrast, long‐term severe drought could lead to a net loss of carbohydrates, especially in the root, implying that prolonged severe drought could lead to NSC depletion in the whole plant. As prolonged drought duration has occurred in and is projected for many regions, this paper could shed light into studies on how trees respond and adapt extending drought duration through nonstructural carbon production, transportation, and reallocation.

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“…Water availability is one of the most important factors affecting plant growth, survival, distribution and forest production in many regions of the world (Ciais et al 2005;Allen et al 2010;Scheffers et al 2016). Grafting may be an option to mitigate environmental stresses on plant growth (Schwarz et al 2010;Machado et al 2013;Cantero-Navarro et al 2016;Han et al 2018). Rootstocks affect plant growth and modulate leaf water potential, stomatal conductance, and photosynthesis under water deficit (Martínez-Ballesta et al 2010;Rodríguez-Gamir et al 2010;Han et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Grafting may be an option to mitigate environmental stresses on plant growth (Schwarz et al 2010;Machado et al 2013;Cantero-Navarro et al 2016;Han et al 2018). Rootstocks affect plant growth and modulate leaf water potential, stomatal conductance, and photosynthesis under water deficit (Martínez-Ballesta et al 2010;Rodríguez-Gamir et al 2010;Han et al 2018). Numerous studies have examined the effects of grafting on plant growth under abiotic stress conditions (Martinez-Rodriguez et al 2008;Rouphael et al 2008;Schwarz et al 2010;Han et al 2013;Machado et al 2013;Han et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Rootstocks affect plant growth and modulate leaf water potential, stomatal conductance, and photosynthesis under water deficit (Martínez-Ballesta et al 2010;Rodríguez-Gamir et al 2010;Han et al 2018). Numerous studies have examined the effects of grafting on plant growth under abiotic stress conditions (Martinez-Rodriguez et al 2008;Rouphael et al 2008;Schwarz et al 2010;Han et al 2013;Machado et al 2013;Han et al 2018). However, these studies tend to focus on aboveground plant responses and traits.…”

Section: Introductionmentioning

confidence: 99%

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Changes in growth and soil microbial communities in reciprocal grafting clones between Populus deltoides males and females exposed to water deficit conditions

Liu

Wang

Gong

et al. 2019

Annals of Forest Science

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& Key message Our findings highlight that male-rooted clones (M/M and F/M) of Populus deltoides are more water-deficit tolerant than female-rooted clones (F/F and M/F), as shown by a smaller decrease in total biomass and net photosynthetic rate in the male-rooted clones. & Context It has been reported that graft clones (female scion and male rootstock) in poplars may be an option to mitigate the effects of water deficit on plants. However, the extent to which grafting mitigates the effect of soil water deficit on soil microorganisms remains poorly understood. & Aims The research was designed to investigate the effects of soil water deficit on plant growth, soil microbial communities, and soil enzymatic activities of the reciprocal graft clones of P. deltoides. & Methods Four different graft clones (female shoot scion and female rootstock, F/F; male shoot scion and female rootstock, M/F; male shoot scion and male rootstock scion, M/M; and female shoot scion and male rootstock, F/M) in P. deltoides were used. Two watering regimes, irrigation and soil water deficit (i.e., non-irrigation conditions, natural levels of precipitation) were included in the experiments. The microbial community structure was quantified using phospholipid fatty acid. & Results Under water deficit, the decreases in total biomass, net photosynthetic rates, and leaf nitrogen content were more evident in M/M and F/M than in F/F and M/F. Bacterial phospholipid fatty acids (PLFAs) and actinomycetal PLFAs remained unaffected in the four graft clones. In contrast, during soil water deficit, fungal PLFAs were higher in M/M and F/M soil coincided with higher extracellular activities of β-1,4-N-acetyl-glucosaminidase and leucine aminopeptidase. & Conclusion Male-rooted clones (M/M and F/M) are more tolerant to water deficit than female-rooted clones (F/F and M/F). It is possible that the better performance of M/M and F/M, when exposed to water deficit, is associated mainly with higher fine root activity, greater specific root length and root/shoot ratio as well as increased fungal PLFAs.

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Improved drought resistance by intergeneric graftingin Salicaceae plants under water deficits

Cited by 11 publications

References 78 publications

Sexually differential tolerance to water deficiency of Salix paraplesia—A female‐biased alpine willow

Sexually differential tolerance to water deficiency of Salix paraplesia—A female‐biased alpine willow

Patterns in nonstructural carbohydrate contents at the tree organ level in response to drought duration

Changes in growth and soil microbial communities in reciprocal grafting clones between Populus deltoides males and females exposed to water deficit conditions

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