Photosynthetica 2001, 39(2):239-244 | DOI: 10.1023/A:1013743523029

Photosynthetic Characteristics of Non-Leaf Organs of Winter Wheat Cultivars Differing in Ear Type and their Relationship with Grain Mass Per Ear

Zhi-Min Wang1, Ai-Li Wei1, Dan-Man Zheng1
1 Department of Agronomy, China Agricultural University, Beijing, The People's Republic of China

Chlorophyll content, photosystem 2 functioning (Fv/Fm, Fv/F0), activity of ribulose-1,5-bisphosphate carboxylase/oxygenase, and net photosynthetic rates (PN) of flag leaf blade, sheath, peduncle, and ear organs were assessed in large-ear type (Pin 7) and small-ear type (ND93) wheat cultivars. Some differences were found in photosynthetic properties between different green plant parts, the values of all studied parameters in ear parts being higher in Pin7 than in ND93. Furthermore, ear surface areas and ear PN in 26 wheat genotypes measured at anthesis showed highly significant positive correlation with grain mass per ear. Hence a greater capability of ear photosynthesis may result in a greater grain yield in large-ear type cultivars.

Additional key words: chlorophyll; net photosynthetic rate; photosystem 2; ribulose-1,5-bisphosphate carboxylase, oxygenase; Trilicum aestivum

Published: June 1, 2001  Show citation

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Wang, Z., Wei, A., & Zheng, D. (2001). Photosynthetic Characteristics of Non-Leaf Organs of Winter Wheat Cultivars Differing in Ear Type and their Relationship with Grain Mass Per Ear. Photosynthetica, 39(2), 239-244. doi: 10.1023/A:1013743523029
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