摘要
通过设计7个钙磷浓度室内水培模拟试验,进行不同钙磷胁迫杉木叶绿素及其荧光参数的比较,探讨钙对低磷环境杉木抗逆性的影响。结果表明:随着低磷胁迫时间的推移,不同钙浓度处理杉木叶绿素含量变化明显,与正常供养CK处理相比,钙对缓解低磷逆境杉木叶绿体受伤程度、保持较高光合效率有显著作用,其中钙浓度Ⅳ(2.0 mmol/L)和Ⅴ(1.0 mmol/L)的这种作用尤为明显。无磷无钙Ⅵ处理条件下杉木叶片PSⅡ反应中心破坏最为严重,且受光抑制程度最大,处理Ⅲ和Ⅳ则较小。施钙可有效缓解低磷胁迫对Fm值的抑制作用。
To explore the effect of calcium on increasing the productivity of Chinese fir plantations in the Southern forest region with low phosphorus,the hydroponic cultures with seven different Ca levels treatments were designed.A study was carried out on the different law of chlorophyll contents and chlorophyll fluorescence characteristics among different treatments during low phosphorus stress.The differences in chlorophyll contents of Chinese fir among different Ca levels treatments became significant gradually,with the prolonging of stress time.Compared with the phosphorus sufficiency group （CK）,Ca had remarkable effects on delaying the degradation of chlorophyll and maintaining relatively high level of photosynthesis efficiency,especially Ca levels in treatment Ⅳ （2.0 mmol/L） and Ⅴ （1.0 mmol/L）.Growing in treatment Ⅵ with no Ca and no P,PSⅡ reaction center of Chinese fir leaves were damaged most seriously.A certain concentration of Ca could effectively relieve the inhibitory effects of low phosphorus stress on Fm.
出处
《中国农学通报》
CSCD
北大核心
2011年第13期20-24,共5页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金项目"耐低磷杉木基因型根系分泌有机酸对磷钙耦合胁迫的响应机制"(30970451)
高等学校博士学科点专项科研基金资助课题"高效觅磷杉木基因型根系觅磷竞争中的通讯机制研究"(20103515120004)
福建省自然科学基金项目"外源钙对磷高效杉木基因型适应低磷逆境的影响机制"(2010J05044)
福建省教育厅项目"磷高效利用杉木基因型的筛选研究"(JK2010021)
关键词
杉木
钙浓度
磷胁迫
叶绿素含量
荧光特性
Chinese fir
calcium levels
phosphorus stress
chlorophyll content
fluorescence characteristic
