Specific metabolic and cellular mechanisms of the vegetative desiccation tolerance in resurrection plants for adaptation to extreme dryness

Liu, Jie; Wang, Yuanyuan; Chen, Xiuxiu; Tang, Ling; Yang, Yang; Yang, Zhaolin; Sun, Runze; Mladenov, Petko; Wang, Xiaohua; Liu, Xiaoqiang; Jin, Songsong; Li, Hui; Zhao, Li; Wang, Yafeng; Wang, Wenhe; Deng, Xin

doi:10.1007/s00425-023-04323-9

Cited by 2 publications

(2 citation statements)

References 110 publications

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“…(2019) reported alteration in the balance of cell proliferations, differentiation, intercellular communication, and morphogenesis in sunflower leaves under supplemental UV-B, and the ultrastructure alterations were emphasized by the combination of two abiotic stresses—UV-B + ozone, and in that study, differential cell growth was among the underlying reasons for such alterations ( Tripathi et al., 2019 ). Cell wall folding has also been identified as an adaptive mechanism to prevent cell death in plant with vegetative desiccation tolerance under drought ( Liu et al., 2024 ). In our study, the combination of UV-B light with heat stress seemed to have allowed the Carignano plants triggering different metabolic pathways to provide leaf tissue protection.…”

Section: Discussionmentioning

confidence: 99%

UV light and adaptive divergence of leaf physiology, anatomy, and ultrastructure drive heat stress tolerance in genetically distant grapevines

Fernandes de Oliveira,

Piga,

Najoui

et al. 2024

Front. Plant Sci.

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The genetic basis of plant response to light and heat stresses had been unveiled, and different molecular mechanisms of leaf cell homeostasis to keep high physiological performances were recognized in grapevine varieties. However, the ability to develop heat stress tolerance strategies must be further elucidated since the morpho-anatomical and physiological traits involved may vary with genotype × environment combination, stress intensity, and duration. A 3-year experiment was conducted on potted plants of Sardinian red grapevine cultivars Cannonau (syn. Grenache) and Carignano (syn. Carignan), exposed to prolonged heat stress inside a UV-blocking greenhouse, either submitted to low daily UV-B doses of 4.63 kJ m−2 d−1 (+UV) or to 0 kJ m−2 d−1 (−UV), and compared to a control (C) exposed to solar radiation (4.05 kJ m−2 d−1 average UV-B dose). Irrigation was supplied to avoid water stress, and canopy light and thermal microclimate were monitored continuously. Heat stress exceeded one-third of the duration inside the greenhouse and 6% in C. In vivo spectroscopy, including leaf reflectance and fluorescence, allowed for characterizing different patterns of leaf traits and metabolites involved in oxidative stress protection. Cannonau showed lower stomatal conductance under C (200 mmol m−2 s−1) but more than twice the values inside the greenhouse (400 to 900 mmol m−2 s−1), where water use efficiency was reduced similarly in both varieties. Under severe heat stress and −UV, Cannonau showed a sharper decrease in primary photochemical activity and higher leaf pigment reflectance indexes and leaf mass area. UV-B increased the leaf pigments, especially in Carignano, and different leaf cell regulatory traits to prevent oxidative damage were observed in leaf cross-sections. Heat stress induced chloroplast swelling, plastoglobule diffusion, and the accumulation of secretion deposits in both varieties, aggravated in Cannonau −UV by cell vacuolation, membrane dilation, and diffused leaf blade spot swelling. Conversely, in Carignano UV-B, cell wall barriers and calcium oxalate crystals proliferated in mesophyll cells. These responses suggest an adaptive divergence among cultivars to prolonged heat stress and UV-B light. Further research on grapevine biodiversity, heat, and UV-B light interactions may give new insights on the extent of stress tolerance to improve viticulture adaptive strategies in climate change hotspots.

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Section: Discussionmentioning

confidence: 99%

UV light and adaptive divergence of leaf physiology, anatomy, and ultrastructure drive heat stress tolerance in genetically distant grapevines

Fernandes de Oliveira,

Piga,

Najoui

et al. 2024

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Previous studies of Tripathi et al (2019) reported alteration in the balance of cell proliferations, differentiation, intercellular communication, and morphogenesis in sunflower leaves under supplemental UV-B, and the ultrastructure alterations were emphasized by the combination of two abiotic stresses-UV-B + ozone, and in that study, differential cell growth was among the underlying reasons for such alterations (Tripathi et al, 2019). Cell wall folding has also been identified as an adaptive mechanism to prevent cell death in plant with vegetative desiccation tolerance under drought (Liu et al, 2024). In our study, the combination of UV-B light with heat stress seemed to have allowed the Carignano plants triggering different metabolic pathways to provide leaf tissue protection.…”

Section: Discussionmentioning

confidence: 79%

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Specific metabolic and cellular mechanisms of the vegetative desiccation tolerance in resurrection plants for adaptation to extreme dryness

Cited by 2 publications

References 110 publications

UV light and adaptive divergence of leaf physiology, anatomy, and ultrastructure drive heat stress tolerance in genetically distant grapevines

UV light and adaptive divergence of leaf physiology, anatomy, and ultrastructure drive heat stress tolerance in genetically distant grapevines

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