Research Laboratory Department of Botany, Sonamukhi College, Sonamukhi-722207, Bankura, West Bengal
* Address for correspondence: Dr. A.K. Biswas, Shyamrayer Bazar, Bishnupur-722122, Bankura, West Bengal.
During the post reproductive period of potato plant (65 days onwards) the levels of chlorophyll in the leaves as well as harvest index (tuber weight: whole plant weight) decreased but aerial plant weight increased as compared to plants of corresponding age, which remained in vegetative condition. Plants separately treated with kinetin and urea remained vegetative throughout and showed increased chlorophyll levels in the leaves and in aerial plant weight but decreased harvest index as compared to untreated control. Detuberization increased chlorophyll level and aerial plant weight. Evidently nutrient exhaustion causes whole plant senescence of potato in normal vegetative slate and the term “Monocarpic senescence” is not applicable to the age induced senescence of such plant.
