Pollination boilogy and breeding system of Eugenia discifera Gamble An endangered species of Western Ghats, India.

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Rajkumar, K. and Keshavanarayan, P. and Sivaram, P. (2015) Pollination boilogy and breeding system of Eugenia discifera Gamble An endangered species of Western Ghats, India. International Journal of Science and Nature, 6 (1). pp. 1-11. ISSN 2229 – 6441

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Abstract

Knowledge of the pollination biology and breeding systems is very important for understanding the life history of long - lived tree species. In case of endangered species, the information may have implication for conservation practices. In the present investigation on Eugenia discifera Gamble, an endangered tree species, belongs to the family Myrtaceae, the reproductive phenology, floral biology, pollination biology and breeding system has been studied during 2012 - 2013. Based on the observation, the lifespan of a single flower was about 1-2 days and to complete the whole process of fruit formation was 102 - 112 days. Inflorescence is terminal raceme or axillary, flowers are hermaphrodite (bisexual), zygomorphic, epigynous and complete. Sepals and petals are four. Stamens are conspicuous and numerous, stigma simple, fruits are globoid with crowed by calyx lobes. Breeding experiments showed there is no apomixis. The lowest mean fruit set were observed with autogamy pollination (34.00±16.73 %) and highest mean fruit set were observed with geitonogamy pollination (48.00±21.68 %) respectively . However, there is no significant difference in the fruit set by geitonogamy and xenogamy. The flowers are often visited by various pollinating insects. The most frequent visitors are butterfly, Apis sp, Anomala sp, Altica cyanea (Weber) and they visit to collect food sources such as pollen and nectar for their survival in turn helps in pollinat ion. The factors responsible for declining the population of Eugenia discifera were recorded

Item Type: Article
Uncontrolled Keywords: Eugenia discifera , reproductive phenology, floral biology, breeding systems and floral visitors.
Subjects: Faculty of Science > Environmental and Biological Sciences > Botany
Divisions: Jnana Bharathi / Central College Campus > Department of Botany
Depositing User: Ms. Sathyavathi N
Date Deposited: 26 Sep 2016 09:25
Last Modified: 26 Sep 2016 09:25
URI: http://eprints-bangaloreuniversity.in/id/eprint/6070

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