摘要
在黔西南喀斯特石漠化地区,顶坛花椒出现大量雄花分化,表明无融合生殖为主的顶坛花椒人工林出现了衰退现象,然而其生长、结实以及养分特征尚不清楚。本研究以贵州省关岭县顶坛花椒为对象,测定了正常开雌花植株(Np)与衰退雄花植株(Dp)新梢生长、各器官生物量以及养分含量特征,分析了衰退对资源在生长、养分储存和生殖间分配的影响。结果表明,Np的果实生物量显著高于Dp(P<0.05),一年生枝和叶片生物量显著低于Dp(P<0.05)。雄花芽中氮、磷、钙及可溶性蛋白含量显著低于雌花芽(P<0.05),花芽中钙含量与氮、磷、钾和镁含量呈显著负相关(P<0.01)。雌花序长度显著高于雄花序(P<0.05),Np的新梢长度及单位多年生结果母枝上新梢抽生数量显著低于Dp(P<0.05),尽管Np根系和枝干养分含量显著高于Dp(P<0.05),但种子粗蛋白却显著低于Dp(P<0.05)。本研究表明,开雄花的顶坛花椒显著改变资源在生长、结实和养分储存间的分配,反映该植物对石漠化区域养分胁迫环境的适应。
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.
作者
陈翠萍
周美玉
周朝彬
王景燕
龚伟
CHEN Cuiping;ZHOU Meiyu;ZHOU Chaobin;WANG Jingyan;GONG Wei(Zunyi Normal College,Zunyi 563006,Guizhou,China;Sichuan Provincial Key Laboratory of Ecological Forestry Engineering,College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Institute of Food Green Processing and Nutri-tion Control Engineering,Zunyi Normal College,Zunyi 563006,Guizhou,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2024年第7期2127-2133,共7页
Chinese Journal of Ecology
基金
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)
遵义师范学院2022年大学生创新创业项目(cxcy202202)资助。
关键词
顶坛花椒
衰退
雄花
资源分配
养分特征
Zanthoxylum planispinum var.dintanensis
decline
staminate flower
resource allocation
nutrient characteristics
作者简介
通信作者:王景燕,E-mail:wangjingyan@sicau.edu.cn;陈翠萍,女,1982年生,硕士研究生,主要研究方向为林木生理生态。E-mail:1505444930@qq.com。
