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Mechano-Stimulation Triggers turgor Changes Associated with Trap Closure in the Darwin Plant Dionaea muscipula

Molecular Plant 2014年第4期7卷 744-746页

作者： María Escalante-Pérez Sonke Scherzer Khaled A.S. Al-Rasheid Christoph Dottinger Erwin Neher Rainer Hedrich Institute for Molecular Plant Physiology and Biophysics University WurzburgD-97070 WurzburgGermany Zoology Department College of ScienceKing Saud UniversityPO Box 2455Riyadh 11451Saudi Arabia Thermosensorik GmbH ErlangenD-91058 ErlangenGermany Department for Membrane Biophysics Max-Planck-Institute for Biophysical ChemistryD-37077 GottingenGermany

The Darwin plant, also known as the Venus flytrap, Dionaea muscipula, has fascinated people since Darwin＇s time. The plant lives in nutrient-poor habitats but has been able to overcome the limitations of its surroundings by evolving a carnivorous lifestyle, particularly by modifying its leaves into active traps to catch animals. When flies, ants, or other small animals touch mechano-sensitive hairs protruding from the inner surface of the bi-lobed trap, it shuts within a fraction of a second.

关键词： VENUS'S flytrap turgor

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How plants sense and respond to osmotic stress

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Journal of Integrative Plant Biology 2024年第3期66卷 394-423页

作者： Bo Yu Dai-Yin Chao Yang Zhao Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesThe Chinese Academy of SciencesShanghai 200032China Key Laboratory of Plant Carbon Capture The Chinese Academy of SciencesShanghai 200032China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyThe Chinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China

Drought is one of the most serious abiotic stresses to land *** sense and respond to drought stress to survive under water *** have studied how plants sense drought stress,or osmotic stress caused by drought,ever since Charles Darwin,and gradually obtained clues about osmotic stress sensing and signaling in *** stress is a physical stimulus that triggers many physiological changes at the cellular level,including changes in turgor,cell wall stiffness and integrity,membrane tension,and cell fluid volume,and plants may sense some of these stimuli and trigger downstream *** this review,we emphasized water potential and movements in organisms,compared putative signal inputs in cell wall-containing and cell wall-free organisms,prospected how plants sense changes in turgor,membrane tension,and cell fluid volume under osmotic stress according to advances in plants,animals,yeasts,and bacteria,summarized multilevel biochemical and physiological signal outputs,such as plasma membrane nanodomain formation,membrane water permeability,root hydrotropism,root halotropism,Casparian strip and suberin lamellae,and finally proposed a hypothesis that osmotic stress responses are likely to be a cocktail of signaling mediated by multiple *** also discussed the core scientific questions,provided perspective about the future directions in this field,and highlighted the importance of robust and smart root systems and efficient source-sink allocations for generating future high-yield stress-resistant crops and plants.

关键词： cell volume drought membrane tension osmotic stress turgor

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Effects of Water Stress on Tissue Elasticity in Nine Tree Species

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北京林业大学学报 1992年第S2期14卷 25-32页

作者： Li JiyueForest Resources College,Beijing Forestry University

The experiments were carried out under the conditions of controlled soil water potential in a greenhouse. The effects of water stress on tissue elasticity were studied in 1 - 3 year-old seedlings Pinus tabulaeformis, Platycladus orientalis, Quercus variabilis, Acer truncatum , Robinia psendoacacia, Fraxinus americana , Amorpha fruticosa, Hip-pophea rahmnoides and Cotinus coggygria ,using the pressure-volume method. Tissue elasticity was characterized using graphs of the modulus of elasticity plotted as a function of turgor pressure and maximum values of the elastic modulus. Changes in tissue elasticity may be an important characteristic allowing low water potentials to be reached and maintained without the development of detrimental water stress. The results show that tissue e-lasticity in needle-leaved tree species is higher than in broad-leaved tree species,but the modulus of elasticity of the tree species tend to increase following development of water stress. Increases in elastic modulus

关键词： water stress water potential turgor elastic modulus pressure-volume

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