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Acta Agron Sin ›› 2011, Vol. 37 ›› Issue (11): 2099-2105.doi: 10.3724/SP.J.1006.2011.02099

• RESEARCH NOTES • Previous Articles     Next Articles

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 Online:2011-11-12 Published:2011-09-06
  • Contact: 李潮海, E-mail:lichaohai2005@yahoo.com.cn, Tel: 0371-63558116

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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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