Date of Award

5-2016

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Aridland Agriculture

First Advisor

Dr. Mohammed Abdul Mohsen Alyafei

Second Advisor

Dr. Shyam S. Kurup

Third Advisor

Dr. Abdul Jaleel Cheruth

Abstract

The stratospheric ozone depletion and elevated solar UV-B radiation have a negative effect on living life forms. UV radiation is one of the unsafe components that cause hindrance to both flora and fauna on the earth. This will have important implications for ecosystem processes and food production. The present study has been designed with primary objective of the effect of UV-B radiation on five numbers of most cultivated Emirates varieties (i.e., BARHI, FRDWT, NBTSF, FRDRD and KHD). After 4 and 8 hrs/day UVB treatment the Shoot, Root and total Plant length, Total plant fresh weight, Shoot and Root fresh and dry weight. Number of leaves, Chlorophyll content, carotenoid content, total phenols content, Proline and various elements were analyzed. The results showed that the reduction in plant growth in terms of shoot and root length, number of leaves and photosynthetic pigments like chlorophyll a, b and carotenoids. Whereas, the UV absorbing compound phenol and stress indicator proline were found to accumulate in a direct proportion to the UV- B treatment. However in case of mineral analysis, Sodium, Phosphorous, Cobalt, Calcium, Manganese were increased while Sulfur, Copper, Potassium and Nitrogen contents were decreased in the date palm varieties studied. . The crop, being a desert plant, has evolved strategies to protect itself against most of these stresses. The effects of UV-B radiation on five different varieties of date palm are studied for the first time in the current research experiment. Further extension of this study to the combined effect of UV-B radiation with other stress parameters, field level study and determination of yield parameters will provide scope for identifying new stress tolerant cultivars of date palm trees.

Included in

Agriculture Commons

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