Substrate composition affects the development of water stress and subsequent recovery by inducing physiological changes in Cistus albidus plants

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”

Download Full-text

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.

Download Full-text

The timing of methyl jasmonate, hydrogen peroxide and ascorbate accumulation during water deficit and subsequent recovery in the Mediterranean shrub Cistus albidus L.

Environmental and Experimental Botany ◽

10.1016/j.envexpbot.2010.02.003 ◽

2010 ◽

Vol 69 (1) ◽

pp. 47-55 ◽

Cited By ~ 28

Author(s):

Tana Jubany-Marí ◽

Els Prinsen ◽

Sergi Munné-Bosch ◽

Leonor Alegre

Keyword(s):

Hydrogen Peroxide ◽

Methyl Jasmonate ◽

Water Deficit ◽

Subsequent Recovery ◽

Cistus Albidus ◽

The Mediterranean ◽

Mediterranean Shrub

Download Full-text

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

Download Full-text

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.

Download Full-text