Vol. 12, Issue 3 (2023)

Author(s):
Kavitha Pushpam A, Ramesh PT and Srinivasan S

Abstract:
Polyamines, especially putrescine (Put), spermidine (Spd) and spermine (Spm) have been implicated in a wide range of biological processes, including growth, development and apoptosis. They are also associated with responses of plants to drought stress. A pot culture experiment was conducted to study the effect of exogenous application of polyamines – Spermine, Spermidine and Putrescine during water stress in blackgram KKM1. Water stress was imposed from 25 DAS followed by foliar application of Put (0.2 mM), Spd (0.2 mM), and Spm (0.2 mM) on 30 DAS. On 35 DAS, assessed the leaf samples for biochemical attributes - Proline, Chlorophyll, Soluble sugars, Total free aminoacid, RWC, Catalase and Peroxidase. The effect of exogenous polyamine application on growth attributes and yield attributes in blackgram under water stress were recorded. The results demonstrated that polyamines (Spd, Spm, Put) on exogenous application mitigated water stress in blackgram and treatment with spermidine had improved water stress tolerance and there is feasibility of polyamines serving as metabolic marker of water stress.