Plant environmental variables studies in Jamun cv. Goma Priyanka

A definite increasing trend for carboxylation efficiency of Jamun plants was observed from March to October months followed by a reduction in photosynthetic rates during November and December months. Stomatal conductance and relative humidity percentage of Jamun leaves were low before monsoon months followed by a sharp increase from July to September months. Transpiration rates were found correspondingly high during June to August months and exhibited a positive correlation with leaf temperature. Vapour pressure deficit values of Jamun leaves were found positively correlated with leaf temperature and were at higher end during May, June and July months. From the experiment, it appeared characteristically that the leathery leaves of Jamun had lower transpiration rates during March to June months. Further, during this period the plant manifested maximum water use efficiency. It indicates better survivability of plants under acute water scarcity which is hallmark of arid and semi arid conditions. It can be utilized as potential underutilized fruit which holds promise for the future in view of adding diversity to fruit basket of the country.