Physiological Changes in Cultured Sorghum Cells in Response to Induced Water Stress

Proline content, leaf water potential (LWP), and leaf diffusive resistance (LDR) were determined for eight sweetpotato genotypes underwater stress conditions. Changes in fatty acid compositions of leaf polar lipids were determined in two sweetpotato genotypes during declining soil moisture. Proline did not accumulate and LWP did not decrease until soil moisture dropped below 10%, but LDR increased as soil moisture decreased. Genotypic differences in proline accumulation and LWP were found. Changes in fatty acid compositions occurred more in glycolipids than in phospholipids. Fatty acid changes were more pronouned in genotype MS20-2 than in “Vardaman”

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Ultrastructural and physiological changes in sporangia of Pseudopevonospova cubensis and Phytophthora infestans exposed to water stress

Canadian Journal of Botany ◽

10.1139/b74-058 ◽

1974 ◽

Vol 52 (3) ◽

pp. 447-450 ◽

Cited By ~ 8

Author(s):

Yigal Cohen ◽

M. Perl ◽

J. Rotem ◽

Helena Eyal ◽

J. Cohen

Keyword(s):

Water Stress ◽

Phytophthora Infestans ◽

Mitochondrial Membrane ◽

Morphological Changes ◽

Membrane Integrity ◽

The Other ◽

Pseudoperonospora Cubensis ◽

Physiological Changes ◽

Mitochondrial Inner Membrane ◽

Dry Out

Viability of sporangia of Pseudoperonospora cubensis and Phytophthora infestans was greatly reduced when sporangia were wetted for a period too short to ensure germination and then allowed to dry out (WDR treatment). No morphological changes were detected in WDR-treated sporangia by microscopic examinations, but when examined under electron microscope they exhibited partial or complete alterations of the mitochondrial inner membrane integrity, some deterioration of the plasmalemma, and extensive vacuolization.Water uptake was not affected but oxygen uptake was totally inhibited in WDR-treated sporangia and previously labeled sporangia exhibited increased leakage. No incorporation of 14C-leucine (into proteins) and 32P-orthophosphate (into nucleic acids) occurred as a result of the treatment. Adding various sugars, alcohols, and adenosine triphosphate (ATP) to the treated sporangia did not restore their viability.It was suggested that the water stress exerted by WDR treatment primarily caused a deterioration of the mitochondrial membrane integrity, which in turn probably led to the other phenomena listed above.

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Physiological Changes in Cultured Sorghum Cells in Response to Induced Water Stress

PLANT PHYSIOLOGY ◽

10.1104/pp.79.1.266 ◽

1985 ◽

Vol 79 (1) ◽

pp. 266-269 ◽

Cited By ~ 47

Author(s):

Shyamala Bhaskaran ◽

Roberta H. Smith ◽

Ronald J. Newton

Keyword(s):

Water Stress ◽

Physiological Changes

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Leaf rolling as indicator of water stress in Cistus incanus from different provenances

10.1101/131508 ◽

2017 ◽

Author(s):

Giacomo Puglielli ◽

Loretta Gratani ◽

Laura Varone

Keyword(s):

Water Stress ◽

Stress Conditions ◽

Physiological Traits ◽

Ex Situ ◽

Physiological Changes ◽

Leaf Rolling ◽

Natural Park ◽

Cistus Incanus ◽

The Relationship ◽

Different Altitudes

ABSTRACTThe relationship between leaf rolling and physiological traits under imposed water stress conditions was analyzed in C. incanus representative saplings collected at different altitudes (i.e. Castelporziano, 41°45′N, 12°26′E, 0 m a.s.l. and Natural Park of Monti Lucretili, 42°33′N, 12°54′E, 750 m a.s.l) and grown ex-situ. The hypothesis that leaf rolling reflected physiological changes occurring during water stress irrespective to the different acclimation to cope with water stress was tested.On the whole, the results show that leaf rolling is associated to an increased sub-stomatal CO2 concentration (Ci) and a decreased carboxylation efficiency (Ce). Moreover, leaf rolling in C. incanus leaves might be involved in protecting the PSII complex under water stress during the progressive inhibition of photosynthetic metabolism.

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Physiological and metabolic alterations in basil (Ocimum basilicum L.) varieties under distinct soil water levels

Boletin Latinoamericano y del Caribe de Plantas Medicinales y Aromaticas ◽

10.37360/blacpma.22.21.1.06 ◽

2022 ◽

Vol 21 (1) ◽

pp. 94-107

Author(s):

Larissa Santos Castro ◽

◽

Daniel Andres Villegas Hurtado ◽

Adriene Aparecida Silva ◽

Danubia Aparecida Costa Nobre ◽

...

Keyword(s):

Water Stress ◽

Water Availability ◽

Ocimum Basilicum ◽

Water Levels ◽

Physiological Changes ◽

Medicinal Species ◽

Phenological Stages ◽

Metabolic Alterations ◽

Physiological Tolerance ◽

Metabolic Characteristics

Basil (Ocimum basilicum L.) is a medicinal species used in several areas, such as food, medicines and cosmetics, and the understanding of its physiological behavior under environmental conditions is of paramount importance for the improvement of cultivation methods. The objective of this study was to evaluate the influence of different water availability under physiological, biochemical and metabolic characteristics, in three distinct genotypes: 'Alfavaca basilicão', 'Gennaro de menta' and 'Grecco à palla', during two different phenological stages (vegetative and reproductive). It was found that the water deficit promotes physiological changes to tolerate water stress, and the studied genotypes have different routes to achieve this physiological tolerance, which culminates in a distinct accumulation of metabolites in plants, and can be considered interesting if the final product is the production of essential oils.

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Influence of Water Stress on Morphological and Physiological Changes in Andrographis paniculata

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.5932 ◽

2017 ◽

Vol 5 (6) ◽

pp. 1550-1556

Author(s):

Bhargavi B. ◽

Keyword(s):

Water Stress ◽

Andrographis Paniculata ◽

Physiological Changes ◽

Influence Of Water

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Enzymatic antioxidant responses to biostimulants in maize and soybean subjected to drought

Scientia Agricola ◽

10.1590/s0103-90162009000300015 ◽

2009 ◽

Vol 66 (3) ◽

pp. 395-402 ◽

Cited By ~ 34

Author(s):

Ana Carolina Feitosa de Vasconcelos ◽

Xunzhong Zhang ◽

Erik H. Ervin ◽

Jorge de Castro Kiehl

Keyword(s):

Reactive Oxygen Species ◽

Superoxide Dismutase ◽

Water Stress ◽

Stomatal Closure ◽

Activity Levels ◽

Oxygen Species ◽

Physiological Changes ◽

Antioxidant Responses ◽

Oxidative Processes ◽

Soybean Plants

Water stress is one of the most important environmental factors inducing physiological changes in plants, such as decrease in the water potential of the cells, the stomatal closure; and the development of oxidative processes mediated by reactive oxygen species (ROS). Antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) are efficient scavengers of ROS. The aim of this research was to examine how the application of biostimulant based on humic substances and aminoacids may affect activity levels of SOD, CAT, and APX of maize and soybean plants under well-watered or drought stress conditions. Pots (4.5 L) were filled with a Typic Hapludult soil where the biostimulants doses were applied. It was taken leaf samples in order to analyze SOD, CAT, and APX activities in plants. SOD and APX activity levels were increased by application of biostimulant 1 in maize subjected to stress. Catalase activity was not enhanced in plants by using the biostimulants. The composition of the biostimulants was not able to enhance stress tolerance in maize and soybean plants subjected to water stress.

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