Senescence of detached leaves in pigeon pea and chick pea: regulation by developing pods

Grover, Anil ; Sinha, S. K. (1985) Senescence of detached leaves in pigeon pea and chick pea: regulation by developing pods Physiologia Plantarum, 65 (4). pp. 503-507. ISSN 0031-9317

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The senescence rate of the subtending leaves in deflowered and control plants of pigeon pea ICajanus cajan (L.) Millsp. cv., Prabhat] and chick pea (Cicer arietinum L. cv. JG 62) were examined during the course of natural and induced senescence, at several stages of pod growth. The leaves from the top 5 nodes on the main axis in pigeon pea and the top 8 nodes on the main axis in chick pea were used throughout the experiments. The natural senescence was characterized in leaves taken directly from the field-growing plants. For the study of induced senescence, the leaves were excised from both control and deflowered plants at various stages of pod growth and placed in test tubes containing water under dark conditions. Senescence was assessed in terms of peroxidase activity and contents of tola] chlorophyll, soluble amino acids and total protein. During natural ageing in the field, the leaves from deflowered plants exhibited delayed senescence in both the species. In contrast, the rate of ageing during induced senescence was higher in the leaves of deflowered plants than in the controls. Although of the same chronological age when excised for induced senescence, the leaves of deflowered plants were evideatly metabolically different from the controls, due to the fact that deflowered plants did not support the development of pods. This difference probably determined the subsequent rate of induced senescence.

Item Type:Article
Source:Copyright of this article belongs to Scandinavian Society for Plant Physiology.
Keywords:Cajanus cajan; Cicer arietinum; Deflowered Plants; Induced Senescence; Natural Senescence
ID Code:15781
Deposited On:13 Nov 2010 12:33
Last Modified:02 Jun 2011 04:48

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