Changes in Plant Water Status, Biochemical Attributes and Seed Quality of Black Gram and Green Gram Genotypes under Drought

Abstract

Drought is one of the major abiotic stresses which adversely affect crop growth and production worldwide as water is vital for every aspect of plant growth and development. The present investigation was carried out during the growing seasons (September -December) of 2012 and 2013 to evaluate the response of black gram (Vigna mungo L.) and green gram (Vigna radiata L.) genotypes in terms of some important growth indices, biochemical traits and seed quality under drought stress. Four commonly grown genotypes-T9, KU 301(black gram) and Pratap, SG 21-5 (green gram) of Assam, India were grown in a randomized block design with three replications under stress and non-stress conditions. Stress was applied by withholding irrigation for fifteen consecutive days at vegetative, flowering and pod filling stages. Leaf area index (LAI), seed protein content and protein yield significantly decreased (p ≤ 0.01) whereas proline, total flavonoids and anthocyanin content increased significantly (p ≤ 0.01) in response to water deficiency. Among the studied genotypes, T9 and Pratap showed better tolerance capacity towards the applied drought by presenting higher values of LAI, plant height stress tolerance index (PHSI), dry matter stress tolerance index (DMSI), proline, total flavonoids, anthocyanin, lower percentage of chlorophyll degradation and finally producing high quality seeds.

Evaluation of Germplasm Accessions for Drought Tolerance in Green gram [Vigna Radiata (L.)]

“…Drought condition was imposed by withholding irrigation 25 days after sowing (Baroowa and Gogoi, 2015;Pooja et al, 2019). Since the experiment was conducted during summer season, there were no unpredicted rains during the entire cropping period hence the drought condition was effectively imposed.…”

Traits Correlated With Differential Drought Tolerance Between Selected Soybean Cultivars

“…In addition, Peng et al( 2006) suggested that anthocyanins may be a beneficial primary antioxidant in rice leaves against oxidative stress induced by environmental stresses. Results of previous studies indicated that drought stress increased proline accumulation (Quilambo, 2004;Baroowa and Gogoi, 2015). Proline has been assigned an important role in adaptation of plants to stress conditions due to its diverse biological effects such as osmotic regulation, antioxidant action, energy transfer as well as carbon and nitrogen source (Kuznetsov and Shevyakova, 1999).…”

Drought in Indian perspective, its impact on major crops and livestock and remedial measures

“…Moisture stress at seed filling in lentil significantly reduced above ground biomass, pod number, pod weight, seed number by 41%,71%,71%,77%, respectively (Sehgal et al, 2017). In greengram and blackgram, drought stress leads to reduced leaf number, plant height, shoot and root biomass, leaf area index, leaf water potential, protein content, yield and increased proline, anthocyanin, flavnoids (Baroowa and Gogoi, 2015;Baroowa and Gogoi, 2016).…”