生态学杂志2024，Vol.43Issue(7)：2158-2165,8.DOI:10.13292/j.1000-4890.202407.015
园林废弃物生物炭对镉胁迫下油菜生理及光合荧光特性的影响
Effects of garden waste biochar on physiological and photosynthetic fluorescence characteristics of rapeseed under cadmium stress
摘要
Abstract
To explore the effects of chitosan-modified biochar originated from Platanus orientalis L.leaves on physi-ological characteristics of rapeseed under cadmium-contaminated soil,a pot experiment with five different treatments of CK,Cd,chitosan+Cd(K+Cd),biochar+Cd(C+Cd),chitosan-modified biochar+Cd(Kc+Cd)was conduc-ted.The results showed that the applications of chitosan,biochar,chitosan-modified biochar all had positive impacts on antioxidant system(POD,CAT,SOD)and osmotic regulatory substances(malondialdehyde(MDA),proline(Pro),soluble sugar and soluble protein)in rapeseed subjected to cadmium stress.Under the Kc+Cd treat-ment,the SOD activity of rapeseed reduced by 28.1％compared with Cd treatment;the soluble sugar and soluble protein content significantly increased by 187.7％and 32.7％,respectively(P＜0.05);the chlorophyll synthesis was effectively enhanced,light saturation point(LSP),light compensation point(LCP),apparent quantum efficien-cy(AQY),maximum net photosynthetic rate(Pmax)and dark respiration rate(Rd)were significantly increased.Maximum fluorescence(Fm),variable fluorescence(Fv),maximum photochemical efficiency of PS Ⅱ(Fv/Fm),electron transport efficiency(ETR),actual photochemical efficiency(Y Ⅱ),and photochemical quenching coeffi-cient(qP)were increased.Chitosan,biochar,and chitosan-modified biochar alleviated the oxidative stress of rape induced by heavy metals,promoted rape growth,and had positive effects on the photosynthetic characteristics and fluorescence characteristics of rape under cadmium stress,with the chitosan-modified biochar performing the best.关键词
园林废弃物生物炭/油菜/镉/生理特性Key words
garden waste biochar/rape/cadmium/physiological characteristics引用本文复制引用
霍瑞朋,张召娣,徐雪芹,王子铭,刘曰华,绳易坤,宋香媛,王子越,王巨媛..园林废弃物生物炭对镉胁迫下油菜生理及光合荧光特性的影响[J].生态学杂志,2024,43(7):2158-2165,8.基金项目
山东省自然科学基金(ZR2020MC088)、教育部产学合作协同育人项目(202102433001)、畜牧学科开放课题(319312101-18,319462207-18)和聊城大学大学生创新创业训练计划项目(CXCY2022396,CXCY2023278)资助. （ZR2020MC088）
