Attri, Lucky .
A Pollination Induced Physiological, Biochemical and Embryological investigations in Two Cymbidium Species (Orchidaceae).
The pollination regulates developmental events that prepare the flowers for fertilization and bringing out the loss of the floral organs that have completed their work of pollen reception and dispersal. Negligible information is available to understand as how various floral organs respond to pollination at biochemical level and how these organs relate to each other in pollinated flowers in Orchids. The overall aim of the study was to investigate the changes in the biochemical markers responsible for senescence of the floral organs and to develop an appropriate system for enhancing the floral longevity using inhibitors of auxin and ethylene (both are concerned with the flower senescence) since it was expected to add further to the floricultural significance of the orchids. The pollinated flowers were experimented to exercise higher damage in term of electrolyte leakage. Moreover, there was an elevation of pigments, sugars and amino acids along with their corresponding enzymes. Pollination up-regulated the signals of some antioxidants like malondialdehyde (MDA), hydrogen peroxide (H2O2) while the ascorbic acids content down-regulated in both the plants in all the organs. Generally, the perianth and lip experienced more damage than other organs of the flowers. Simultaneously, pollination is found responsible for ovule development. Out of TIBA (auxin inhibitor) and silver nitrate (ethylene inhibitor) treated flowers, the later experienced less damage, therefore long life span over the pollinated ones with AgNo3 treatment.
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1 - Panjab University, Botany, Panjab University, Department of Botany, Chandigarh, UT, 160014, India
Presentation Type: Oral Paper:Papers for Sections
Location: Stevens 1/Hilton
Date: Wednesday, July 11th, 2007
Time: 1:15 PM