Studies on some of the physiological attributes of mango.
Pandey R. M., Chauhan P. S., Sharma Y. K.
Author Affiliation: Division of Fruits and Horticultural Technology, Indian Agricultural Research Institute, New Delhi 110?012, India.
: 381-393
Abstract : Shoots and leaves of 25-year-old Dashehari mango trees were tagged in Mar., and chlorophyll content, leaf stomata number, and photosynthetic activity (using 14CO2) were determined at intervals from 2 to 90 days after shoot emergence. Leaf chlorophyll concentration decreased from day 2 to day 4 after shoot emergence, but then increased to a maximum at 60 days for chlorophyll a and at 75 days for chlorophyll b; chlorophyll concentration decreased thereafter, the basal leaves losing chlorophyll most rapidly. The rate of chlorophyll accumulation was independent of leaf position on the shoot. Leaf stomatal density decreased from 4 to 15 days after shoot emergence (due to leaf expansion) and then remained constant up to 60 days, irrespective of leaf position. Photosynthetic activity fluctuated in the period from 5 to 45 days after shoot emergence, then increased rapidly during the next 30 days, and decreased thereafter. All leaves had similar photosynthetic activity in the 60 days after shoot emergence, but thereafter apical leaves had the highest activity. 14CO2 fixation by leaves on the reproductive shoots was highest when fruits were full grown.