PJB-2022-69
REGULATION OF GROWTH AND YIELD ATTRIBUTES OF LINSEED (LINUM USITATISSIMUM L.) IN DROUGHT STRESS THROUGH SEED PRIMING AND FOLIAR APPLICATION OF Î’-AMINOBUTYRIC ACID
Tauqeer Ahmad Yasir
Abstract
Several adaptations approaches have been used to mitigate drought stress. Beta aminobutyric acid (BABA) is an amino acid which is non-proteinic in nature as well as used to alleviate drought stress in plants and enhance crop production in such type of adverse environments. Therefore, the present study was carried out to observe the role of BABA in alleviating drought stress conditions in Linseed (Linum usitatissimum L.). For this, two parallel pot experiments were conducted, in which seed priming and foliar treatment of BABA was applied on drought-stressed linseed plants. In the first experiment, BABA seed priming comprising four concentrations (0, 50, 100 and 150mM) was done on linseeds under three moisture regimes by maintaining field capacity at 40%, 60% and 80% (FC40, FC60 and FC80) respectively. Whereas, in another experiment, the foliar method with the same concentrations of BABA was applied under the same field capacity levels. Data regarding the growth and yield parameters revealed that severe moisture stress not only (FC40) significantly reduced plant growth period to flower initiation, heading but also number of branches per plant, plant height, dry weight of shoot and root, capsules produced on each plant, seeds in each capsule, weight of 100-seeds and per plant seed yield under both experiments. Seed priming with BABA at 50mM markedly enhanced all growth and yield-related traits of linseed exposed to different moisture regimes. Whereas, foliar application of BABA at 100mM improved plant growth and yield-related traits of linseed relative to other concentrations in response to drought. On the basis of present findings, it can be concluded that seed priming with BABA and foliar application of the chemical compound at 50mM and 100mM respectively have great prospects with regards to the improvements of linseed yield in water-limited environments.
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