DEHYDROGENASES AND ISOCITRATE LYASE ACTIVITY DURING POLLEN GERMINATION IN CALOTROPIS-PROCERA
CP MALIK, MB SINGH
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES SECTION B | INDIAN ACADEMY SCIENCES | Published : 1977
Isocitrate lyase (ICL) activity is described in the quiescent and germinating pollen of Calotropis procera. The behaviour of the enzyme depended upon the presence or absence of exogenous substrate. The activity of this enzyme in relation to some dehydrogenases (MDH; ICDH; G-6-PDH) is compared. Effects of actinomycin-D and cycloheximide on the activity of different enzymes is described. The increase in the activity of ICL and G-6-PDH, during the activation phase, is attributed to their de novo synthesis. The possibility of sucrose in causing repressing effects on ICL synthesis and/or activation is brought out. © 1977 Indian Academy of Sciences.