Saponin synthesis and cotton growth is antagonistically regulated by solar UV-B radiation

作     者：DEHARIYA Priti KATARIA Sunita GURUPRASAD Kadur Narayan PANDEY Govind Prakash 

作者机构：School of Life Sciences Devi Ahilya University School of Biochemistry Devi Ahilya University Shri Vaishnav Vidyapeeth Vishwavidyalaya 

出 版 物：《Journal of Cotton Research》 (棉花研究（英文）)

年 卷 期：2018年第1卷第3期

页      面：30-40页

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 1203[管理学-农林经济管理] 09[农学] 0903[农学-农业资源与环境] 0836[工学-生物工程] 0713[理学-生态学] 

基　　金：Financial support by UGC Research Fellowship(F.4-1/2006(BSR)to Dehariya P.) Department of Science Technology Women Scientists-A Scheme(SR/WOS-A/LS-674/2013-2016) to Kataria S 

主　　题：Bioassay Cotton Growth Inhibitor Saponin UV radiation 

摘      要：Background: Earlier we have reported that the exclusion of solar UV-B increased the growth and yield of cotton plants as compared with ambient UV-B. The UV-B radiation effects on the saponins and the impact of ambient and reduced UV-B on the accumulation of saponins has not been investigated yet. Thus a field experiment was conducted to study the influence of solar UV-B on the growth response and saponin synthesis in cotton(Gossypium hirsutum) var. Vikram plants by the exclusion of UV-B. The cotton plants were grown in specially designed iron chambers, wrapped with filters that excluded UV-B(315 nm), or transmitted ambient ***: Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf *** plant height in UV-B excluded plants was due to elongated internode and more number of *** in growth was accompanied by a decrease in the accumulation of saponins, which was quantified by the spectrophotometric, TLC and HPLC methods. Solvent extraction of saponins from the internodes and leaves were used for the bioassay of Amaranthus hypocotyl growth and expansion of cucumber cotyledons. Extracts obtained from the UV-B excluded plants(leaves and internodes) promoted the growth to a larger extent as compared with the extracts obtained from ambient grown ***: The result indicates that solar UV-B may possibly suppress the plant growth by regulating the synthesis of natural growth inhibitor’s like saponin.