Silicon and Nitric Oxide-Mediated Regulation of Growth Attributes, Metabolites and Antioxidant Defense System of Radish (Raphanus sativus L.) under Arsenic Stress

作     者：Savita Bhardwaj Tunisha Verma Ali Raza Dhriti Kapoor 

作者机构：Department of BotanySchool of Bioengineering and BiosciencesLovely Professional UniversityPhagwara144411India College of AgricultureFujian Agriculture and Forestry University(FAFU)Fuzhou350002China 

出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)

年 卷 期：2023年第92卷第3期

页      面：763-782页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

主　　题：Antioxidant defense system oxidative stress metal stress metabolism reactive oxygen species crop productivity 

摘      要：Arsenic(As)contaminated food chains have emerged as a serious public concern for humans and animals and are known to affect the cultivation of edible crops throughout the ***,the present study was designed to investigate the individual as well as the combined effects of exogenous silicon(Si)and sodium nitroprusside(SNP),a nitric oxide(NO)donor,on plant growth,metabolites,and antioxidant defense systems of radish(Raphanus sativus L.)plants under three different concentrations of As stress,i.e.,0.3,0.5,and 0.7 mM in a pot *** results showed that As stress reduced the growth parameters of radish plants by increasing the level of oxidative stress markers,i.e.,malondialdehyde and hydrogen ***,foliar application of Si(2 mM)and pretreatment with SNP(100μM)alone as well as in combination with Si improved the plant growth parameters,i.e.,root length,fresh and dry weight of plants under As ***,As stress also reduced protein,and metabolites contents(flavonoids,phenolic and anthocyanin).Activities of antioxidative enzymes such as catalase(CAT),ascorbate peroxidase(APX),guaiacol peroxidase(POD),and polyphenol oxidase(PPO),as well as the content of non-enzymatic antioxidants(glutathione and ascorbic acid)decreased under As *** most of the parameters in radish,As III concentration showed maximum reduction,as compared to As I and II ***,the individual and combined application of Si and NO significantly alleviated the As-mediated oxidative stress in radish plants by increasing the protein,and metabolites *** in the activities of CAT,APX,POD and PPO enzymes were *** of glutathione and ascorbic acid were also enhanced in response to co-application of Si and NO under As *** obtained were more pronounced when Si and NO were applied in combination under As stress,as compared to their individual *** short,the current study highlights that Si and NO synergisticall