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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (10): 1930-1935.doi: 10.3724/SP.J.1006.2009.01930

• RESEARCH ACTIVITIES • Previous Articles     Next Articles

Comparison of Photosynthetic Characteristics of Leaves in Pop Corn，Sweet Corn and Glutinous Corn during the Late Growing Period

ZUO Zhen-Peng1,SUN Qing-Quan1,*,DONG Lu-Hao1,WANG Jing1,MA Deng-Chao2,DONG Shu-Ting1   

  1. 1 Agronomy College of Shandong Agricultural University / National Key Laboratory of Crop Biology, Tai’an 271018, China; 2 Jining Agricultural Science Institute, Jining 272131, China
  • Received:2009-04-09 Revised:2009-06-25 Online:2009-10-12 Published:2009-08-07
  • Contact: SUN Qing-Quan,E-mail:qqsun18@163.com

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Abstract:

The differences were studied among pop corn, sweet corn and glutinous cornin photosyntheticcharacteristics of leaves in different positions of the plants during the late growing period in the field conditions. The results showed thatdifferences of photosynthetic characteristics of leaves were superior for glutinous corn than for the sweet corn and pop corn. Moreover all the indices of photosynthesis rate (Pn), content of chlorophyll (Chl), transpiration rate (Tr) and stomatal conductance (Gs) were glutinous corn>sweet corn>pop corn. The photosynthesis rate of mid-leaves was glutinous corn>sweet corn>pop corn, whereas the difference of photosynthesis among lower leaves in plant was not significant. The chlorophyll content (Chl) of top and middle leaves was pop corn>sweet corn>glutinouscorn. Correlation analysis showed that it was significant at 5% or 1% probability levels in the different growing periods between Pn and Chl, Tr, Gs. At the same time, the photosynthetic characters of leaves in the top and middle positions of plant excelled those in the low leaves for all the three corn types. The Pn, Chl, duration for high Pn and Tr of glutinouscorn were superior to pop corn and sweet corn; attenuation time for leaf photosynthetic capability of pop corn and sweet corn was earlier than that for glutinous corn.

Key words: Appropriative maize, Corn types, Leaf, Leaf position, Photosynthetic physiological characteristics


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