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毛竹种子萌发及幼苗生长对环境条件的可塑性响应 被引量:2

The Plastic Response of Seed Germination and Seedling Growth to Enviroment,a Study on Moso Bamboo
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摘要 以毛竹种子、实生苗为研究对象,分析了其种子在强声波处理后,高温、干旱胁迫对生物量累积分配和异速生长特征等行为的影响。结果表明:频率1 000 Hz、强度100 db的机械声波和自主研发的新型海藻肥营养液对毛竹种子的萌发率有明显的效果;机械声波的使用可以提高高温胁迫下的种子萌发率,种子萌发数量、萌发胁迫指数和萌发持续时间表明其作用比施用主成分为海藻肥的营养液更显著。声波预处理种子后,对其萌发的幼苗的生长亦出现后延的影响:正常环境(25℃)下,声波处理的萌发苗的生长更倾向于地上部的生长,而营养液处理的萌发苗有向地下部分配的倾向性;35~40℃的环境温度将明显抑制毛竹幼苗的生长,对声波预处理的萌发苗有明显的负作用,其幼苗侧根数、地上高和根长数据都显著下降,而营养液预处理对根系有保护作用;干旱与高温的作用机理有明显差异,毛竹幼苗表型可塑性表现亦不同,生长发育过程中对水分比较敏感,声波预处理的幼苗纵向地发育根系,而干旱对照更倾向于横向平面发展根系;营养液在干旱胁迫下,对根系仍有保护作用,这与高温胁迫相似。 Sound,a special type of alternative stress,has an obvious effect on plant growth and seed germination.This paper aimed to analyze the germination response of Moso Bamboo seed after the treatment of strong sound(SS) based on the mature technique of floral induction in nature population.Meanwhile,the long-standing effects such as biomass distribution and allometry on seedlings under high temperature(>35℃) or drought treatment were studied,for which the seedlings germinated with the pretreatment of SS for o...
出处 《竹子研究汇刊》 2008年第4期35-40,共6页 Journal of Bamboo Research
基金 "十一五"林业科技支撑计划专题(2006BADO3A0402)
关键词 毛竹 种子 幼苗 机械应力 声波 可塑性 Moso Bamboo Seed Seedling Mechanical stress Strong sound Plasticity
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二级参考文献49

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同被引文献22

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