biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 51:165-168, 2007 | DOI: 10.1007/s10535-007-0032-x

Photosynthetic rate and yield formation in different maize hybrids

L. Ding1, K. J. Wang2,*, G. M. Jiang1,2,*, M. Z. Liu1, L. M. Gao1
1 Institute of Botany, The Chinese Academy of Sciences, Beijing, P.R. China
2 Agronomy Department, Shandong Agricultural University, Shandong, China

The relationship between photosynthetic rate and yield formation processes of the newer and older maize hybrids were investigated. Leaf area at flowering (source) and kernel number (sink) of the newer hybrids were greater than the older ones although their light-saturated photosynthetic rate (Psat) were not greater than the older ones before flowering. After flowering, Psat and chlorophyll content of the newer hybrids declined more slowly than the older ones. They not only distributed almost all photosynthates produced after flowering to grain but also reallocated some reserved photosynthates produced before flowering to grain. The newer hybrids exhibited greater grain mass than the older ones mostly because they could optimally regulate the photosynthetic rate and yield formation processes to maximize grain mass.

Keywords: chlorophyll content; dry mass; photosynthetic rate; Zea mays L
Subjects: chlorophyll a,b; gas exchange; growth analysis, plant development, biomass and yield enhancement; hybrids, maize; photon flux density (PPFD, PFD); Zea mays

Received: May 11, 2005; Accepted: January 7, 2006; Published: March 1, 2007  Show citation

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Ding, L., Wang, K.J., Jiang, G.M., Liu, M.Z., & Gao, L.M. (2007). Photosynthetic rate and yield formation in different maize hybrids. Biologia plantarum, 51(1), 165-168. doi: 10.1007/s10535-007-0032-x
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