A Comparative Study Of Gracilaria Corticata SLFAnd Cymodocea Serrulata SGLF From Alcohol Aqueous Method Of Extraction On The Drought Stressed Cowpea

K Jeba Ananthi; Kalpanadevi.V; Jeevitha. M; Sornalakshmi.V

A Comparative Study Of Gracilaria Corticata SLFAnd Cymodocea Serrulata SGLF From Alcohol Aqueous Method Of Extraction On The Drought Stressed Cowpea

Author(s)	Dr. K Jeba Ananthi, Kalpanadevi.V, Jeevitha. M, Sornalakshmi.V
Country	India
Abstract	Abstract The present study aimed to compare the effectiveness of seaweed liquid fertilizer (SLF) prepared from Gracilaria corticata and seagrass liquid fertilizer (SGLF) prepared from Cymodocea serrulata using the alcohol–aqueous extraction method in alleviating water stress in cowpea (Vigna unguiculata). The seaweed and seagrass extracts were evaluated for their potential to improve the morphological, biochemical and physiological characteristics of drought-stressed seedlings. Cowpea seeds were grown under controlled pot culture conditions and subjected to different treatments, including SLF, SGLF, polyethylene glycol (PEG), water-stressed untreated plants and unstressed controls. The extracts were applied as a 1% soil drench, and the seedlings were analysed for growth parameters, photosynthetic pigments, biochemical constituents, enzyme activities and phytohormones. The results revealed that Gracilaria SLF-treated drought-stressed cowpea seedlings exhibited increased root length, lateral root development, photosynthetic pigments, sugar, amino acid and lipid contents, along with enhanced α-amylase and nitrate reductase activities. Similarly, Cymodocea SGLF treatment improved root growth and lateral root formation and increased photosynthetic pigments, amino acids, proteins, lipids and nitrogen content under water stress. The accumulation of zeatin was also enhanced in SLF- and SGLF-treated seedlings compared with stressed untreated plants, whereas abscisic acid levels were highest in water-stressed untreated seedlings. Overall, the findings indicate that alcohol–aqueous extracts of Gracilaria corticata and Cymodocea serrulata have potential as natural biostimulants to improve selected growth and biochemical responses of cowpea under water stress. These findings support further investigation of seaweed- and seagrass-based liquid fertilizers as sustainable agricultural inputs for improving crop performance under drought conditions
Keywords	Seaweed liquid fertilizer, seagrass liquid fertilizer, Gracilaria corticata, Cymodocea serrulata, cowpea, water stress, alcohol–aqueous extraction, plant biostimulants.
Field	Biology > Agriculture / Botany
Published In	Volume 8, Issue 5, September-October 2026
Published On	2026-10-27

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A Comparative Study Of Gracilaria Corticata SLFAnd Cymodocea Serrulata SGLF From Alcohol Aqueous Method Of Extraction On The Drought Stressed Cowpea

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