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Abstract - Issue Sep 2021, 42 (5) Back
nstantaneous and historical temperature effects on a-pinene
contrasting bread wheat genotypes for heat and drought stress tolerance for
rhizospheric soil properties
T. Chugh2, K. Venkatesh1, R. Tiwari1, P.
Sharma1, S. Sheoran1, R. Singh1, H.M.
Mamrutha1, N.K. Arora3, G. Singh1 and G.P.
Institute of Wheat and Barley Research, Karnal-132 001, India
Microbiology, COBS&H, Punjab Agricultural University, Ludhiana-144 004,
Salinity Research Institute, Karnal-132 001, India
*Corresponding Author Email : firstname.lastname@example.org
The study aimed at investigating differential response of contrasting bread
wheat genotypes for heat and drought stress towards changes in chemical and
microbial components of rhizospheric soil for developing climate resilient wheat
Methodology: Rhizospheric soils were studied for changes in pH,
electrical conductivity, cations, anions, micro-elements, major-elements,
organic carbon and organic matter, and plant growth promoting
rhizobacteria(PGPRs) abundance at booting and anthesis stages of growth in
four contrasting genotypes during 2017-18 and 2018-19 crop seasons
The contrasting genotypes (HD2967 and WH730) for heat tolerance exhibited
significant interaction between genotype and stage of growth for Na+,
K+ and nitrogen, while genotypes (HUW468 and C306) for drought
tolerance exhibited it for available nitrogen only. Significant difference
for Ca2+, Mg2+, iron, manganese, nitrogen and potassium
levels were recorded in drought stress related genotypes at two stages of
growth. The heat tolerant genotype showed 2.54 and 10.67 folds enhancement in
population of N2 fixing and spore forming bacteria at anthesis
compared to sensitive genotypes, while drought tolerant genotype showed 1.51,
1.07 and 6.26 folds in P-solubilizing, N2 fixing and general
Interpretation: Contrasting genotypes for heat and
drought stresses responded differently for chemical properties and abundance
of PGPRs in rhizospheric soils.
Abiotic stress, Plant growth promoting rhizobacteria, Rhizospheric soil,
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