Physiological responses and aquaporin expression upon drought and osmotic stress in a conservative vs prodigal Fragaria x ananassa cultivar

2019 ◽  
Vol 145 ◽  
pp. 95-106 ◽  
Author(s):  
Britt Merlaen ◽  
Ellen De Keyser ◽  
Lei Ding ◽  
Olivier Leroux ◽  
François Chaumont ◽  
...  
2017 ◽  
Vol 27 (2) ◽  
pp. 161-169 ◽  
Author(s):  
Lidiia Samarina ◽  
Valentina Malyarovskaya ◽  
Yulija Abilfazova ◽  
Natalia Platonova ◽  
Kristina Klemeshova ◽  
...  

Structural and physiological responses of chrysanthemum to repeated osmotic stress were studied. Plants were cultured for 2 weeks (for each stress1 and stress 2) on half MS supplemented with mannitol 100 mM (Treatment I) and 200 mM (Treatment II). First stress inhibited growth parameters stronger than second stress in treatment I. In treatment II both stress events strongly inhibited growth parameters of micro‐shoots. Proline content exceeded control 6 ‐ 8 times after 1st stress, and 2 ‐ 5 times after the 2nd stress in treatments I and II, respectively. Soluble protein was accumulated in leaves during both stress exposures, and 2 ‐ 2.5 times exceeded control after the 2nd stress. Relative water content in both treatments increased after the 2nd stress exposure. In treatment II chlorophyll а and carotenoids contents were 8.78 and 4.62 mg/g comparing to control (4.21 and 2.25 mg/g, respectively) after the 1st stress. But after the 2nd stress there was no difference with control.Plant Tissue Cult. & Biotech. 27(2): 161-169, 2017 (December)


2021 ◽  
Vol 22 (5) ◽  
pp. 2658
Author(s):  
Beatriz A. Rodas-Junco ◽  
Graciela E. Racagni-Di-Palma ◽  
Michel Canul-Chan ◽  
Javier Usorach ◽  
S. M. Teresa Hernández-Sotomayor

Plants are subject to different types of stress, which consequently affect their growth and development. They have developed mechanisms for recognizing and processing an extracellular signal. Second messengers are transient molecules that modulate the physiological responses in plant cells under stress conditions. In this sense, it has been shown in various plant models that membrane lipids are substrates for the generation of second lipid messengers such as phosphoinositide, phosphatidic acid, sphingolipids, and lysophospholipids. In recent years, research on lipid second messengers has been moving toward using genetic and molecular approaches to reveal the molecular setting in which these molecules act in response to osmotic stress. In this sense, these studies have established that second messengers can transiently recruit target proteins to the membrane and, therefore, affect protein conformation, activity, and gene expression. This review summarizes recent advances in responses related to the link between lipid second messengers and osmotic stress in plant cells.


2019 ◽  
Vol 99 (15) ◽  
pp. 6973-6980 ◽  
Author(s):  
Ana CN Antunes ◽  
Tanize dos S Acunha ◽  
Ellen C Perin ◽  
Cesar V Rombaldi ◽  
Vanessa Galli ◽  
...  

1990 ◽  
Vol 47 (12) ◽  
pp. 2358-2363 ◽  
Author(s):  
M. R. Meador ◽  
W. E. Kelso

Plasma osmotic and electrolyte concentrations as well as branchial Na+/K+ and Mg++ ATPase activities were determined in the field for largemouth bass, Micropterus salmoides, from a brackish marsh and freshwater lake in southcentral Louisiana. Laboratory experiments were conducted to evaluate plasma chemistry and gill ATPase activities of largemouth bass from both locations exposed to 0, 4, 8, and 12‰ salinity. No significant differences in physiological responses were detected between marsh and freshwater largemouth bass exposed to 0, 4, or 12‰. Exposure to 12‰ salinity resulted in osmotic stress in largemouth bass from both locations. At 8‰, marsh largemouth bass had significantly higher plasma solutes and lower gill ATPase activities than freshwater fish. Different physiological responses by marsh and freshwater largemouth bass during exposure to 8‰ salinity indicated that marsh largemouth bass have adapted to environments of variable salinity by reducing active ion transport and tolerating elevated plasma son levels.


2021 ◽  
Vol 27 (1) ◽  
pp. 135-150
Author(s):  
Emna Ghouili ◽  
Khaled Sassi ◽  
Moez Jebara ◽  
Yassine Hidri ◽  
Rim Nefissi Ouertani ◽  
...  

2021 ◽  
Vol 20 (9) ◽  
pp. 2382-2394
Author(s):  
Ahsan ASGHAR Muhammad ◽  
Heng-ke JIANG ◽  
Zhao-wei SHUI ◽  
Xi-yu CAO ◽  
Xi-yu HUANG ◽  
...  

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