Characterization of photosynthetic apparatus of pea chlorophyll mutants and their heterotic F1 hybrids with standard genotype (cv. Torsdag)
1998
Vaishlya, O.B. (Tomsk State Univ. (Russian Federation). Dept. of Plant Physiology and Biotechnology) | Ladygin, V.G. | Sokolov, V.A. | Semenova, G.A.
In comparison to cv. Torsdag, in leaves of low-productive Pisum sativum chlorophyll mutants the decrease in chlorophyll content was caused by the decrease in cell number per unit volume. Qualitative changes in activities of photosystem (PS) I in mutant M2004, and quantitative changes of PS 1 and PS2 in mutants M2004 and M2014 and in hybrids were also found. However, the activity of ribulose-1,5bisphosphate carboxylase (RuBPC) in M2014, and those of RuBPC and glyceraldehyde phosphate dehydrogenase in M2004 and hybrids were higher than in cv. Torsdag. The hybrids inherited the normal structure of photosynthetic apparatus of standard genotype in parallel with the compensatory gene complex of M2004, which was expressed at many levels of organization. This may be the basis of hybrid vigour in this case.
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