华南农业大学学报2016，Vol.37Issue(3)：62-66,5.DOI:10.7671/j.issn.1001-411X.2016.03.009
不同光照度生境对海芋块茎形态、淀粉含量及叶绿素含量的影响
Effect of light intensity on tuber morphology, starch content and leaf chlorophyll content of calla lily
摘要
Abstract
Objective] In order to understand the response of calla lily , Alocasia macrorrhiza L., to dif-ferent light intensities , verify the accuracy of SPAD chlorophyll meter in chlorophyll measurements of cal-la lily, and provide a theoretical basis and technical supports for utilizing large land resources under ma -ture rubber plantation and using chlorophyll meter correctly in physiological experiments of calla lily .[Method]SPAD value , chlorophyll a , chlorophyll b and total chlorophyll contents of different calla lily leaves under different light intensities were determined using SPAD-502 chlorophyll meter and alcohol-ac-etone extraction methods .[Result]Compared with calla lily grown under natural light , tuber starch con-tent and girth of calla lily under tree-shade decreased by 15.08%and 12.96%respectively , while tuber length increased by 12.11%.SPAD value, chlorophyll a, chlorophyll b and total chlorophyll contents of calla lily under natural light were lower than those of calla lily under tree-shade , while chlorophyll a/b ratio was higher .SPAD value of calla lily under natural light increased gradually from the first-top-leaf to the fifth-top-leaf ( except the third-top-leaf) .SPAD value of calla lily under tree-shade increased gradu-ally from the first-top-leaf to the second-top-leaf reaching the maximum , and then decreased gradually from the third-top-leaf to the fifth-top-leaf.Light intensity influenced chlorophyll a , chlorophyll b and to-tal chlorophyll contents of different leaves in the same way as it did for SPAD value , but in different de-gree .[Conclusion]Light is conducive to starch synthesis in calla lily tubers .Calla lily can capture more light energy through increasing SPAD value , chlorophyll a , chlorophyll b and total chlorophyll contents of leaves, especially the upper leaves , under limited light conditions .The SPAD value of the fourth-top-leaf is the best estimation for the chlorophyll contents of calla lily under natural light , while the SPAD value of the fifth-top-leaf is the best estimation for the chlorophyll contents under tree-shade.关键词
海芋/光照强度/形态/SPAD值/叶绿素含量Key words
calla lily/light intensity/morphology/SPAD value/chlorophyll content分类
农业科技引用本文复制引用
李娟,林位夫,周立军..不同光照度生境对海芋块茎形态、淀粉含量及叶绿素含量的影响[J].华南农业大学学报,2016,37(3):62-66,5.基金项目
国家自然科学基金青年基金（31301856）；中国热带农业科学院橡胶研究所基本科研业务费专项（1630022011009）；现代农业产业技术体系建设专项 （）
