四川农业大学学报2025，Vol.43Issue(6)：1437-1444,8.DOI:10.16036/j.issn.1000-2650.202506629
水杨酸及γ-氨基丁酸对枇杷幼苗硒富集及抗氧化能力的影响
Effects of Salicylic Acid and γ-Aminobutyric Acid on Selenium Accumulation and Antioxidant Capacity in Loquat Seedlings
摘要
Abstract
[Objective]This study aimed to investigate the effects of salicylic acid(SA)and γ-aminobu-tyric acid(GABA)on selenium accumulation and antioxidant capacity in loquat seedlings,and to iden-tify the optimal strategy for enhancing Se accumulation efficiently.[Method]One-year-old 'Chunhua' loquat seedlings were used as materials.Treatments consisted of foliar spraying with:distilled water(CK),0.25 mg/L sodium selenite(Se),0.25 mg/L sodium selenite plus 250 mg/L salicylic acid(Se+SA),0.25 mg/L sodium selenite plus 1.5 g/L γ-aminobutyric acid(Se+GABA),and the three-component combination(Se+SA+GABA).The effects on seedling growth,photosynthetic pigment con-tent,antioxidant enzymes activities,and Se accumulation characteristics were analyzed.[Result]The Se treatment significantly increased Se content and accumulation in both roots and shoots.Compared with Se alone,the Se+SA treatment further enhanced Se content and accumulation,raising root and shoot Se content by 20.64%and 21.84%,and root and shoot Se accumulation by 22.31%and 23.64%,respec-tively.Similarly,the Se+GABA treatment also significantly increased Se content and accumulation rela-tive to Se treatment,with root and shoot Se content rising by 18.65%and 19.23%,and accumulation by 19.69%and 19.85%,respectively.Among the treatments,Se+SA exhibited the greatest enhancement ef-fect.In contrast,the Se+SA+GABA combination reduced these Se-related parameters.Compared with CK,the Se treatment increased SOD,POD,and CAT activities and total chlorophyll content by 4.22%,21.76%,13.13%,and 21.83%,respectively.Relative to the Se treatment,Se+SA increased total chloro-phyll content,SOD,and POD activities by 15.98%,3.62%,and 17.23%,respectively.Se+GABA en-hanced total chlorophyll,carotenoid content and SOD activity by 23.45%,6.39%and 4.01%,respec-tively.Se+SA+GABA increased chlorophyll b and POD activity by 5.17%and 7.37%,but decreased chlorophyll a,total chlorophyll,and carotenoid content by 2.19%,1.07%,and 6.39%,respectively.[Conclusion]Treatments with Se,Se+SA,Se+GABA,and Se+SA+GABA can improve photosynthetic pigment content,shoot Se accumulation,and antioxidant capacity in loquat seedlings.Among these,the Se+GABA treatment showed the most significant overall effect,followed by Se+SA and Se alone,while Se+SA+GABA exhibited the weakest efficacy.关键词
水杨酸/γ-氨基丁酸/枇杷苗/硒富集/抗氧化能力Key words
salicylic acid/γ-aminobutyric/loquat seedling/selenium accumulation/antioxidant capacity分类
农业科技引用本文复制引用
王菲,宋潘晖,栗欣宇,周甲云,罗弦,邓群仙,贾永霞..水杨酸及γ-氨基丁酸对枇杷幼苗硒富集及抗氧化能力的影响[J].四川农业大学学报,2025,43(6):1437-1444,8.基金项目
四川省科技支撑计划"十四五"育种攻关项目(2021YFYZ0023-07) （2021YFYZ0023-07）
国家现代化农业产业技术体系四川水果创新团队项目(SCCXTD-2024-04). （SCCXTD-2024-04）
