Genotypic differences in photosynthesis and dynamic characteristics of NPQ in maize

Ming, Z. and Wen, J. and Ishill, R. and Li, C. (2006) Genotypic differences in photosynthesis and dynamic characteristics of NPQ in maize. Asian Journal of Plant Sciences, 5 (4). pp. 709-712.

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Greenhouse experiments were conducted to identify the genotypic differences in photosynthesis and energy balance in internal energy balance in the internal photosystem in 4 hybrids and 8 inbred maize lines. The photosynthetic rate (Pn) and some main parameters of chlorophyll fluorescence (Fo/Fv, qP, NPQ and p) were measured and the dynamic characteristics of non-photochemical quenching (NPQ) were observed and analysed during photosynthetic induction. There was a marked difference in Pn, but no difference existed between the different maize genotypes based on Fv/Fm, qP and p, while apparent differences existed in the NPQ and its change characteristics such as TNPQ, TNPQmax, RNPQ and RNPQmax. The maximum value among all tested genotypes was approximately 2 times the minimum one. TNPQ and NPQmax were significantly correlated to Pn, which meant that not only NPQ but also its dynamic characteristics such as TNPQ and NPQmax, especially TNPQ might be good indices for selecting the high photosynthesis genotypes in maize

Item Type: Article
Author Affiliation: Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Plant Physiology and Biochemistry > Biochemistry
Divisions: Maize
Depositing User: Mr T L Gautham
Date Deposited: 10 Jan 2011 21:30
Last Modified: 10 Jan 2011 21:30
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