Year: 2017, Issue: June

Phenotypic and physiological aspects related to drought tolerance in Sorghum [(Sorghum bicolor (L.) Moench] under rainfed conditions in Northern transitional zone of Karnataka.

Author:

P. Priya, V. C. Patil and B. N. Aravind Kumar

Keyword:

Stay green, Relative water content, Seed priming, Chlorophyll, Concentration

Field experiment was conducted to study the effect of cropping systems and different seed priming treatments on phenotypic and physiological performance of sorghum grown as intercrop in maize. In the present investigation, it was observed that, as the growth stage advanced from 90 to 105 DAS there was gradual decrease in the number of green leaves per plant. At 90 DAS, all the priming treatments were found beneficial. However, at a later stage (105 DAS), bio-priming (5.85) and combination of all priming methods (6.05) helped to retain significantly higher number of green leaves. Similarly, the RWC of intercropped sorghum at 90 DAS (81.18%) was higher than in sole sorghum (76.30%). In addition, there was progressive decline in RWC of sorghum. Till 105 DAS, the priming treatment did not alter RWC. At 90 DAS, it was observed that, the leaf chlorophyll concentration of all the priming treatments except hydro-priming and at 105 DAS, osmo-priming (46.43) and bio-priming (49.43) were found superior to farmers' practice (42.86).

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