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作物学报 ›› 2011, Vol. 37 ›› Issue (11): 2099-2105.doi: 10.3724/SP.J.1006.2011.02099

• 研究简报 • 上一篇    下一篇

种植密度对夏玉米穗位叶片解剖结构的影响

李春奇1,2，王庭梁2，程相文3，曹偌遥2，李芸2，芦鹏2，李潮海1,*   

  1. 1河南农业大学农学院 / 农业部玉米区域技术创新中心，河南郑州450002；2河南农业大学生命科学学院，河南郑州 450002；3河南省浚县农业科学研究所，河南浚县 456284
  • 收稿日期:2011-03-14 修回日期:2011-06-25 出版日期:2011-11-12 网络出版日期:2011-09-06
  • 通讯作者: 李潮海, E-mail:lichaohai2005@yahoo.com.cn, Tel: 0371-63558116
  • 基金资助:

    本研究由国家玉米产业技术体系(nycytx-02)项目资助。

Effects of Plant Density on Ear Leaf Anatomical Structure in Summer Maize

LI Chun-Qi1,2,WANG Ting-Liang2,CHENG Xiang-Wen3,CAO Ruo-Yao2,LI Yun2,LI Chao-Hai1,LU Peng2   

  1. 1 College of Agronomy / Henan Agricultural University / Regional Center for New Technology Creation of Corn, Ministry of Agriculture, Zhengzhou 450002, China, 2 College of Life Science, Henan Agricultural University, Zhengzhou 450002, China, 3 Agricultural Scientific Research Institute of Xunxian, Xunxian 456284, China
  • Received:2011-03-14 Revised:2011-06-25 Published:2011-11-12 Published online:2011-09-06
  • Contact: 李潮海, E-mail:lichaohai2005@yahoo.com.cn, Tel: 0371-63558116

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1333

被引次数

14

摘要： 为了研究种植密度对玉米穗位叶片解剖结构的影响, 以生产上广泛种植的玉米杂交种郑单958和浚单20为材料，采用石蜡制片和超薄切片法对不同种植密度下2个玉米品种穗位叶片和叶绿体的结构进行了观察分析。结果表明, 随着种植密度的增加，2个玉米品种的叶片厚度、叶脉横截面积和叶脉木质部面积减小，上、下表皮的气孔频度减少(郑单958显著，浚单20不显著)，叶肉细胞叶绿体的基粒数量减少，维管束鞘细胞叶绿体的数量减少；种植密度在75 000株 hm-2时产量最高。相关性分析显示，叶脉木质部面积、气孔频度、叶肉细胞叶绿体的基粒数量、叶肉细胞叶绿体的基粒数量与种植密度呈显著负相关，与单穗籽干重、千粒重、穗粒数量呈显著正相关，因而成为玉米生产上的重要结构指标。

关键词: 种植密度, 夏玉米, 穗位叶, 解剖结构

Abstract: A field experiment was conducted using maize hybrid Zhengdan 958 and Xundan 20 in 2006–2008, combined with paraffin method and ultramicrotomy to reveal relationship between plant density and ear leaf anatomic structure. The results showed that all the leaf thickness, vein area in cross section and xylem areain cross section, the stomata frequencies of upper and lower epidermis (for hybrid Zhengdan 958 the difference is significant, but for Xundan 20 is not),the number of grana in the chloroplast of mesophyll and chloroplasts in the vascular bundle sheath were decreased with the increase of plant density;the yield was the highest at the plant density of 75 000 plants ha-1.The xylem area in cross section of leaf vein, stomata frequencies, number of grana in the chloroplast of mesophyll and chloroplasts in the vascular bundle sheath had remarkably negative correlation with plant density,but positive correlation with the kernel weight and grainnumber of single ear and 1000-kernel weight. The leaf structural parameters and agronomic indices will be important for application in maize production in the future.

Key words: Plant density, Summer maize, Ear leaf, Anatomical structure

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