Differences in UV-B tolerance among Spirodela punctata ecotypes

被引：10

作者：

Jansen, MAK ^{[1
]}

van den Noort, RE ^{[1
]}

Boeke, SJ ^{[1
]}

Huggers, SAM ^{[1
]}

de Haan, JH ^{[1
]}

机构：

[1] Wageningen Univ Agr, Dept Plant Physiol, NL-6703 BD Wageningen, Netherlands

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY | 1999年 / 48卷 / 2-3期

关键词：

UV-B tolerance; radiation stress; Spirodela punctata; photosystem II;

D O I：

10.1016/S1011-1344(99)00044-5

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Ultraviolet-B (UV-B) radiation negatively impacts on plant growth and development. Not all plants are UV sensitive: strong tolerance to UV-B radiation is particularly found among plants that naturally occur in areas of high W-B radiation. There is Limited knowledge about the mechanisms underlying such enhanced natural tolerance. In this study, we demonstrate strong differences in UV-B tolerance among Spirodela punctata ecotypes. Tolerance is visualized as sustained photosystem II (PSII) activity and biomass accumulation in fronds exposed to UV-radiation. We find that the enhanced tolerance is constitutive and specific for UV-radiation stress, but it does not correlate with well-characterized UV-adaptation responses like the accumulation of bulk UV-screening pigments in the epidermis, or increased oxygen radical scavenging activity. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：194 / 199

页数：6

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