Sexual Differences in Growth and Physiological
Characteristics of &lt;i&gt;Populus cathayana&lt;/i&gt; under Pb
Stress and &lt;i&gt;Leucoagaricus&lt;/i&gt; sp. Colonization

Feng, Huan; Dou, Qing; Chi, Yang; QingZhe, Xie; Wang, HaiHua; Wang, Chunyan

doi:10.15244/pjoes/125768

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…It has been found that after inoculation with AM the Pro of male P. cathayana increased under drought and salt stress ( Li et al., 2015 ), while the Pro accumulation of female was significantly increased only after inoculation with AM under salt stress and Pb stress ( Wu et al., 2016 ), and the Pro of male was significantly higher than that of female after inoculation with AM under Pb stress ( Feng et al., 2021 ). In the present study, females and males can produce more Pro to regulate osmotic pressure under Pb stress, while Pb + AM treatment significantly increased the Pro accumulation of males ( Figure 3D ).…”

Section: Discussionmentioning

confidence: 99%

Physiological response and phytoremediation potential of dioecious Hippophae rhamnoides inoculated with arbuscular mycorrhizal fungi to Pb and Zn pollution

Fang,

Zeng,

Jia

et al. 2024

Front. Plant Sci.

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Plant-microorganism combined remediation of heavy metal pollution has been reported, but little attention has been paid to the effect of arbuscular mycorrhizal (AM) fungi on phytoremediation of dioecious plants under heavy metal pollution. In this study, the growth, physiological responses and phytoremediation traits of Hippophae rhamnoides were determined to evaluate whether sex-specific ecophysiological responses and phytoremediation capacities of females and males are affected by additional AM fungi (Glomus mosseae) under heavy metal treatments. The results showed that excess Pb and Zn stresses inhibited photosynthetic capacities of both sexes. However, inoculated AM fungi treatment increased the activity of photosynthesis, content of photosynthetic pigment, activity of superoxide dismutase, the content of proline and root Pb content and enrichment coefficient of males while decreased root Pb content of females under Pb stress. On the other hand, inoculated AM fungi treatment increased the photosynthetic activities and Pro accumulation of females, and activity of superoxide dismutase and transport coefficient of males under Zn stress. These results demonstrate that H. rhamnoides inoculated AM fungi showed significant sex-specific responses on the growth, physiological traits and phytoremediation potential to Pb and Zn stress. AM fungi significantly improved the tolerance of males to Pb stress and both sexes to Zn stress, which indicates H. rhamnoides and AM fungi can be used as a plant-microbial combined remediation method for Pb and Zn contaminated soil. More attention should be paid on sexual-specific responses and phytoremediation of dioecious plants to heavy metals in the future.

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Section: Discussionmentioning

confidence: 99%

Physiological response and phytoremediation potential of dioecious Hippophae rhamnoides inoculated with arbuscular mycorrhizal fungi to Pb and Zn pollution

Fang,

Zeng,

Jia

et al. 2024

Front. Plant Sci.

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Photosynthesis-related physiology and metabolomics responses of

et al. 2022

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Manganese (Mn) plays an essential role in plant growth; however, excessive Mn is toxic to plants. Polygonum lapathifolium Linn. was tested as a novel Mn-hyperaccumulating species in our previous study, but the underlying mechanisms of this hyperaccumulation are poorly understood. A hydroponic experiment with (8 mmol L−1) and without additional Mn (CK) was established to explore the possible mechanisms through the effects on photosynthesis-related physiological characteristics and metabolomics. The results showed that additional Mn increased plant biomass, photosynthesis, and stomatal conductance related to increases in the effective photochemical quantum yield of photosystem II and relative electron transport rate (P < 0.05). The results from liquid chromatography–mass spectrometry revealed 56 metabolites differentially accumulated between the plants composing these two groups. Metabolites were enriched in 20 metabolic pathways at three levels (environmental information processing, genetic information processing, and metabolism), of which five metabolic pathways were associated with significant or extremely significant changes (P < 0.05). These five enriched pathways were ABC transporters (environmental information processing), aminoacyl-tRNA biosynthesis (genetic information processing), biosynthesis of amino acids, d-arginine and d-ornithine metabolism, and arginine biosynthesis (metabolism). Flavonoids may play a key role in Mn tolerance, as they accumulated more than 490-fold, and the relationship between flavonoids and Mn tolerance needs to be studied in the future.

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Sulfur metabolism, organic acid accumulation and phytohormone regulation are crucial physiological processes modulating the different tolerance to Pb stress of two contrasting poplars

Shi

Kan

et al. 2022

Tree Physiology

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To investigate the pivotal physiological processes modulating lead (Pb) tolerance capacities of poplars, the saplings of two contrasting poplar species, Populus × canescens with high Pb sensitivity and P. nigra with relatively low Pb sensitivity, were treated with either 0 or 8 mM Pb for 6 weeks. Pb was absorbed by the roots and accumulated massively in the roots and leaves, leading to overproduction of reactive oxygen species (ROS), reduced photosynthesis and biomass in both poplar species. Particularly, the tolerance index (TI) of P. × canescens was significantly lower than that of P. nigra. Moreover, the physiological responses including the concentrations of nutrient elements, thiols, organic acids, phytohormones and non-enzymatic antioxidants, and the activities of antioxidative enzymes in the roots and leaves were different between the two poplar species. Notably, the differences in concentrations of nutrient elements, organic acids and phytohormones were remarkable between the two poplar species. A further evaluation of the Pb-tolerance-related physiological processes showed that the change of ‘sulfur metabolism’ in the roots were greater, and that of ‘organic acid accumulation’ in the roots and ‘phytohormone regulation’ in the leaves were markedly smaller in P. × canescens than those in P. nigra. These results suggest that there are differences in Pb tolerance capacities between P. × canescens and P. nigra, which is probably associated with their contrasting physiological responses to Pb stress, and that sulfur metabolism, organic acid accumulation, and phytohormone regulation are probable the key physiological processes modulating the different Pb tolerance capacities between the two poplar species.

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Sexual Differences in Growth and Physiological Characteristics of <i>Populus cathayana</i> under Pb Stress and <i>Leucoagaricus</i> sp. Colonization

Cited by 3 publications

References 33 publications

Physiological response and phytoremediation potential of dioecious Hippophae rhamnoides inoculated with arbuscular mycorrhizal fungi to Pb and Zn pollution

Physiological response and phytoremediation potential of dioecious Hippophae rhamnoides inoculated with arbuscular mycorrhizal fungi to Pb and Zn pollution

Photosynthesis-related physiology and metabolomics responses of

Sulfur metabolism, organic acid accumulation and phytohormone regulation are crucial physiological processes modulating the different tolerance to Pb stress of two contrasting poplars

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