Back to Search
Start Over
Understanding abiotic stress tolerance mechanisms in soybean: a comparative evaluation of soybean response to drought and flooding stress.
- Source :
-
Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2015 Jan; Vol. 86, pp. 109-120. Date of Electronic Publication: 2014 Nov 20. - Publication Year :
- 2015
-
Abstract
- Many sources of drought and flooding tolerance have been identified in soybean, however underlying molecular and physiological mechanisms are poorly understood. Therefore, it is important to illuminate different plant responses to these abiotic stresses and understand the mechanisms that confer tolerance. Towards this goal we used four contrasting soybean (Glycine max) genotypes (PI 567690--drought tolerant, Pana--drought susceptible, PI 408105A--flooding tolerant, S99-2281--flooding susceptible) grown under greenhouse conditions and compared genotypic responses to drought and flooding at the physiological, biochemical, and cellular level. We also quantified these variations and tried to infer their role in drought and flooding tolerance in soybean. Our results revealed that different mechanisms contribute to reduction in net photosynthesis under drought and flooding stress. Under drought stress, ABA and stomatal conductance are responsible for reduced photosynthetic rate; while under flooding stress, accumulation of starch granules played a major role. Drought tolerant genotypes PI 567690 and PI 408105A had higher plastoglobule numbers than the susceptible Pana and S99-2281. Drought stress increased the number and size of plastoglobules in most of the genotypes pointing to a possible role in stress tolerance. Interestingly, there were seven fibrillin proteins localized within the plastoglobules that were up-regulated in the drought and flooding tolerant genotypes PI 567690 and PI 408105A, respectively, but down-regulated in the drought susceptible genotype Pana. These results suggest a potential role of Fibrillin proteins, FBN1a, 1b and 7a in soybean response to drought and flooding stress.<br /> (Copyright © 2014 Elsevier Masson SAS. All rights reserved.)
- Subjects :
- Abscisic Acid metabolism
Adaptation, Physiological genetics
Amino Acid Sequence
Chlorophyll metabolism
Chloroplasts metabolism
Chloroplasts ultrastructure
Droughts
Fibrillins
Floods
Genotype
Glucose metabolism
Microfilament Proteins classification
Microfilament Proteins genetics
Microfilament Proteins metabolism
Microscopy, Electron, Transmission
Molecular Sequence Data
Photosynthesis genetics
Phylogeny
Plant Proteins classification
Plant Proteins genetics
Plant Proteins metabolism
Plant Stomata physiology
Raffinose metabolism
Sequence Homology, Amino Acid
Glycine max genetics
Glycine max metabolism
Starch metabolism
Sucrose metabolism
Water metabolism
Adaptation, Physiological physiology
Photosynthesis physiology
Glycine max physiology
Stress, Physiological
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2690
- Volume :
- 86
- Database :
- MEDLINE
- Journal :
- Plant physiology and biochemistry : PPB
- Publication Type :
- Academic Journal
- Accession number :
- 25438143
- Full Text :
- https://doi.org/10.1016/j.plaphy.2014.11.010