Change in the predominance from C4 to C3 pathway following anthesis in Sorghum

Khanna, Renu and Sinha, S.K. (1973) Change in the predominance from C4 to C3 pathway following anthesis in Sorghum. Biochemical and Biophysical Research Communications, 52 (1). pp. 121-124.

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Sorghum and Pennisetum species are known to have predominantly C4pathway. This pathway is associated with several other characteristics. These conclusions are based on studies confined largely to seedlings. A developmental study of PEP carboxylase and RuDP carboxylase in and confirmed in seedlings thepredominance of PEP carboxylase, high malate: 3-phorophoglycerate ratio and ‘Krantz’ anatomy. However, after flowering, RuDP carboxylase was predominant inthe leaves of both Sorghum and Pennisetum. This observation was associated with higher 3-phosphoglycerate:malate ratio following14CO2 fixation. The anatomy of the leaf remained unchanged and so was the chlorophyll a:b ratio. This changein system coincided with a slight fall in mean daily temperature. But in wheat RuDP carboxylase remained the predominant enzyme in spite of the rising mean daily temperature. Therefore, thechangefrom C4to C3 appears to be related more tothe developmental stages.

Item Type: Article
Author Affiliation: Water Technology Centre Indian Agricultural Research Institute New Delhi 110012, India
Subjects: Plant Physiology and Biochemistry > Biochemistry
Social Sciences > Plant Physiology and Biochemistry > Biochemistry
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 24 May 2012 10:51
Last Modified: 24 May 2012 10:51
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