生态学杂志2024，Vol.43Issue(7)：2127-2133,7.DOI:10.13292/j.1000-4890.202407.011
顶坛花椒衰退对生长、结实和养分储存的影响
Effects of Zanthoxylum planispinum var.dintanensis decline on growth,fruiting,and nutrient storage
摘要
Abstract
Due to a plenty of staminate flower differentiation,Zanthoxylum planispinum var.dintanensis,mainly reproduced by apomixis,was declined in the karst rocky desertification area of southwest Guizhou Province.Howev-er,the mechanisms involved in growth,fruiting,and nutrient characteristics of Z.planispinum var.dintanensis remain unclear.Here,we investigated the characteristics of shoot growth,biomass,nutrient contents of different organs in normal plants with pistillate flower(Np)and declined plants with staminate flower(Dp),to analyze the effects of plant decline on resource allocation among growth,nutrient storage,and reproduction.The results showed that fruit biomass of Np was significantly higher than that of Dp(P＜0.05),whereas shoot and leaf biomass of Np was significantly lower than that of Dp.The contents of nitrogen,phosphorus,calcium,and soluble protein in stam-inate flower buds were significantly lower than those in pistillate flower buds(P＜0.05),while the contents of calci-um in flower buds were negatively correlated with the contents of nitrogen,phosphorus,potassium,and magnesium(P＜0.01).Moreover,the length of pistillate inflorescence was significantly longer than that of staminate inflores-cence,but shoot length and shoot number per bearing base branch in Np were significantly reduced.Although nutri-ent contents in root and stem of Np were significantly increased,crude protein content in seed was significantly low-er than that of Dp.Our results indicated that Z.planispinum var.dintanensis with staminate flowers significantly altered resource allocation among growth,fruiting and nutrient storage,reflecting its adaptation to the nutrient stress environment in rocky desertification regions.关键词
顶坛花椒/衰退/雄花/资源分配/养分特征Key words
Zanthoxylum planispinum var.dintanensis/decline/staminate flower/resource allocation/nutrient characteristics引用本文复制引用
陈翠萍,周美玉,周朝彬,王景燕,龚伟..顶坛花椒衰退对生长、结实和养分储存的影响[J].生态学杂志,2024,43(7):2127-2133,7.基金项目
贵州省科技厅基础研究计划项目(黔科合基础-ZK[2022]一般579)、贵州省林业局应用基础研究项目(黔林科合[2022]39号)、国家现代农业产业技术体系四川特色经作创新团队项目(sccxtd-2020-12)、博士启动基金(遵师BS[2020]3号)、赤水河流域环境保护与山地农业发展人才基地项目、国家重点研发计划项目(2018YFD1000605,2020YFD1000700)和遵义师范学院2022年大学生创新创业项目(cxcy202202)资助. （黔科合基础-ZK[2022]一般579）
