Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress

Zhang, Sheng; Chen, Lianghua; Duan, Baoli; Korpelainen, Helena; Li, Chunyang

doi:10.1016/j.foreco.2012.03.014

Cited by 62 publications

(40 citation statements)

References 52 publications

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“…The different tolerance between males and females in a space will result in gender imbalance, eventually disordering the composition and structure of ecology. The sexual dimorphism involved a cascade of complex mechanism (Song et al 2014;Zhang et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Influence of arbuscular mycorrhiza on photosynthesis and water status of Populus cathayana Rehder males and females under salt stress

Zhen

Liu

et al. 2015

Acta Physiol Plant

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The influence of arbuscular mycorrhizal fungi (AMF) Rhizophagus irregularis on biomass, root morphological characteristics, water status, gas exchange and ion contents of Populus cathayana Rehder males and females under salt stress was studied in a greenhouse experiment. Sex had no influence on AMF colonization. Salt stress decreased the biomass, modified root characteristics, inhibited photosynthesis, relative water content (RWC), while increased the water use efficiency (WUEi), the ratio of root/shoot (RSR) and salt ion contents within the plants. Males and females differed in response to the salt stress and AMF inoculation. AMF inoculation increased the biomass of root, the biomass of shoot, and decreased RSR, especially in males. The root length, root volume (RV), root surface area, and root tip numbers (RTN) were increased with AMF inoculation in males, while RV and RTN were decreased with AMF inoculation in females. AMF had positive effects on RWC and WUEi in both sexes. Mycorrhizal cuttings also had higher gas exchange capacity, lower salt ion contents than non-mycorrhizal cuttings. The principal component analysis showed that males exhibited a better salt tolerance than females, and AMF inoculation had positive effects on both sexes, especially in males.

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Section: Discussionmentioning

confidence: 99%

Influence of arbuscular mycorrhiza on photosynthesis and water status of Populus cathayana Rehder males and females under salt stress

Zhen

Liu

et al. 2015

Acta Physiol Plant

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“…; Zhang et al . , ). This observation confirms the presence of different photosynthesis capacity and competitive ability of females and males.…”

Section: Discussionmentioning

confidence: 99%

Intra‐ and inter‐sexual competition of Populus cathayana under different watering regimes

et al. 2013

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Summary1. Previous studies have demonstrated that poplar is sexually dimorphic in its responses to environmental stresses and provided evidence of sex-related differences in protein composition, gene transcription and morphological and physiological processes. However, sexual competition of poplar has not yet been studied. 2. We employed Populus cathayana males and females as a model to investigate intra-and intersexual competition under well-watered condition and drought stress. 3. Our results indicated that competition significantly affected sexual dimorphism of P. cathayana under different watering regimes. Sexual competition was environment-dependent and modified by drought. In females, drought intensified the negative effect of intrasexual competition. Similar resource utilization patterns of females may aggravate pressure for resources under drought stress. Under intersexual competition, females showed a greater competitive ability than males under well-watered condition, while males showed a slight competitive advantage under drought stress. Intersexual competition seems to alleviate the sexual dimorphism of P. cathayana in response to drought stress, as females increase fitness and males decrease fitness compared with intrasexual competition. 4. Sexual dimorphism in resource utilization patterns and niche segregation may contribute to sexual competition in a given environment. Sexual competition was found to affect competitive ability and fitness of both sexes, which may cause spatial segregation of sexes in P. cathyana populations.

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“…Tissues were dehydrated in a graded ethanol series (50, 60, 70, 80, 90, 95, and 100%) and embedded in eponaraldite for 2 hr. Ultrathin sections (80 nm) were sliced, stained with uranyl acetate and lead citrate, and mounted on copper grids for observation via H‐600IV transmission electron microscopy (TEM; Hitachi, Inc.) (Zhang, Chen, Duan, Korpelainen, & Li, ).…”

Section: Methodsmentioning

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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Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress

Cited by 62 publications

References 52 publications

Influence of arbuscular mycorrhiza on photosynthesis and water status of Populus cathayana Rehder males and females under salt stress

Influence of arbuscular mycorrhiza on photosynthesis and water status of Populus cathayana Rehder males and females under salt stress

Intra‐ and inter‐sexual competition of Populus cathayana under different watering regimes

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

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