Production and accumulation of UV-B absorbing compounds in UV-B irradiated leaves of rice, Oryza sativa L.: Effects of varying UV-B doses on leaf damage, phenolic content and HPLC peak I area
Issue Date
9-2005
Abstract
The effects of varying UV-B doses on leaf damage, phenolic content and HPLC peak I area were studied using 65-d-old plants of the UV-B tolerant rice cultivar, M202, and the UV-B susceptible rice cultivar, Dular. Results showed that the production and accumulation of UV-B-absorbing compounds in rice leaves were affected by leaf position and levels (dose) of UV-B and time or duration of UV-B irradiation or exposure. The youngest terminal leaves showed the least damage when exposed to medium and high UV-B doses. The production of these absorptive compounds as represented by relative phenolics and HPLC peak I were significantly higher in younger leaves and lower in older or senescing leaves. M202 showed significantly higher amounts of peak I area and relative phenolics compared to the UV-B susceptible rice cultivar, Dular. The results also confirmed the strong relationship of overall damage rating and area of HPLC peak I. The development of UV-B symptoms in the susceptible cultivar was hastened when a high UV-B treatment was applied. Peak I area did not accumulate in the UV-B susceptible Dular at any given UV-B dose.
Source or Periodical Title
Philippine Agricultural Scientist
ISSN
317454
Volume
88
Issue
3
Page
292-304
Document Type
Article
Language
English
Subject
Flavonoids, Oryza sativa, Phenolics, Susceptibility, Tolerance, Ultraviolet, UV-B, UV-B absorbing compounds
Recommended Citation
Caasi-Lit, M.T.. (2005). Production and accumulation of UV-B absorbing compounds in UV-B irradiated leaves of rice, Oryza sativa L.: Effects of varying UV-B doses on leaf damage, phenolic content and HPLC peak I area. Philippine Agricultural Scientist. 88 (3) ; pp. 292-304
Digital Copy
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