CHARACTERIZATION OF WILD VIGNA SPECIES FOR SEEDLING WATER-LOGGING TOLERANCE AS REVEALED BY PHYSIO-CHEMICAL AND EXPRESSION PROFILING
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Date
2022-08-24
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Banda University of Agriculture & Technology, Banda-210001, Uttar Pradesh, India
Abstract
Mungbean is the most important short duration grain legume. It is consumed as
food and feed, fodder and manure crop. It has wider adaptability to array of environmental
conditions, shorter life cycle and improves the soil health through symbiosis. These
features indicated that there is an ample scope of vertical and horizontal expansion of
mungbean worldwide. However, it is much weather sensitive crop in which water logging
at early crop growth stage caused sever plant loss and stunted growth. The development of
water logging tolerant mungbean varieties required the potential donors. The crop wild
relatives (CWRs) and cross species Vigna possessed improved tolerance can be identified
and introgressed in mungbean. The 32 Vigna accessions including cultivated and wild
belong to nine different species were evaluated and six genotypes namely PRR 2008-2,
PRR 2008-2-1, TCR-93, L-24, TCR-20 and W-17 were found as water logging tolerant.
These tolerant genotypes had better survival, strong root system, proper shoot elongation
and delayed chlorophyll degradation. The two genotypes PRR 2008-2-1 and PRR 2008-2
showed induction of adventitious roots from the hypocotyl region under water logging
stres. The histochemical staining indicated the lower cell death in leaves of PRR 2008-2.
The PRR 2008-2 showed formation of aerenchyma as adoptive mechanism as compare to
IPM 2-3. The higher activity of ADH, proline and O2 were was recorded in PRR 2008-2
whereas it was lower in IPM 2-3. The expression of candidate genes and transcriptional
factors provides a fundamental resources for understanding signaling behaviour, hormonal
regulation and antioxidant homeostatsis involved in water logging tolerance.
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Citation
Sandeep Kumar. 2022. CHARACTERIZATION OF WILD VIGNA SPECIES FOR SEEDLING WATER-LOGGING TOLERANCE AS REVEALED BY PHYSIO-CHEMICAL AND EXPRESSION PROFILING. Thesis, M.Sc.