摘要
为探究地菍种子萌发特性及植株耐阴性,研究以清水浸泡为对照,分别采用不同浓度的赤霉素(GA3)(50、100、200 mg/L)和6-苄氨基嘌呤(6-BA)(1、5、10、20 mg/L)浸泡地菍种子,分析不同激素及浓度对地菍种子发芽率的影响;此外,研究对地菍苗进行遮光处理,测量了0%、50%、70%、90%遮光率下地菍的株高增长量、叶面积、叶绿素含量及净光合速率等形态和生理指标。结果表明:100 mg/L GA3和20 mg/L 6-BA处理能显著提高种子发芽率,发芽率分别达到83.6%和83.2%;70%遮光率处理下地菍的株高增长量、叶面积及最大净光合速率最大,90%遮光率时叶绿素含量最高。研究表明适宜浓度的GA3与6-BA浸种能有效促进地菍种子萌发,且地菍具有典型的耐阴植物特性,70%遮光率为其最适生长条件。
This study aims to investigate the seed germination rate and shade tolerance of Melastoma dodecandrum.The seeds were soaked in water(control),gibberellin(GA3)at 50,100,200 mg/L,or 6-benzylaminopurine(6-BA)at 1,5,10,and 20 mg/L.The effects of different plant hormones and their concentrations on seed germination rate were analyzed.In addition,M.dodecandrum plants were treated with shade(0%,50%,70%,and 90%),and the plant height increase,leaf area,chlorophyll content,and net photosynthetic rate were measured.The results showed that 100 mg/L GA3 and 20 mg/L 6-BA treatments significantly improved the seed germination rate,which reached 83.6%and 83.2%,respectively.The plant height increase,leaf area,and maximum net photosynthetic rate were the highest in the 70%shade treatment,and the chlorophyll content reached the highest value in the 90%shade treatment.The results indicated that soaking seads in GA3 and 6-BA at appropriate concentrations could significantly improve the seed germination rate of M.dodecandrum.M.dodecandrum had typical characteristics of shade tolerance,with 70%shading as the optimal growth condition.
作者
汪弘毅
丁华娇
任璐娜
陈晓玲
WANG Hong-yi;DING Hua-jiao;REN Lu-na;CHEN Xiao-ling(Hangzhou Botanical Garden,Hangzhou 310013,PRC)
出处
《湖南农业科学》
2025年第4期16-19,共4页
Hunan Agricultural Sciences
基金
杭州市西湖风景名胜区管理委员会科研项目(2023-011)。
关键词
地菍
发芽率
耐阴性
激素
叶绿素
净光合速率
Melastoma dodecandrum
germination rate
shade tolerance
hormone
chlorophyll
net photosynthetic rate
