Morphological and metabolic alterations in duckweed (Spirodela polyrhiza) on long-term low-level chronic UV-B exposure

被引：14

作者：

Farooq, M ^{[1
]}

Shankar, U ^{[1
]}

Ray, RS ^{[1
]}

Misra, RB ^{[1
]}

Agrawal, N ^{[1
]}

Verma, K ^{[1
]}

Hans, RK ^{[1
]}

机构：

[1] Ind Toxicol Res Ctr, Photobiol Div, Lucknow 226001, Uttar Pradesh, India

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2005年 / 62卷 / 03期

关键词：

Spirodela polyrhiza; duckweed; UV-B radiation; long-term exposure; phototoxicity; aquatic ecosystem; morphological and metabolic alteration; plant productivity;

D O I：

10.1016/j.ecoenv.2005.01.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Laboratory grown duckweed (Spirodela polyrhiza) plants were exposed to 0.72 and 1.44 J of UV-B radiation daily for 7 days at 0.4 mW/cm(2) intensity. Chlorosis and necrosis were observed along with depletion in protein, pigments (chlorophyll, pheophytin, carotenoids, phycoerythrin, phycocyanin, and flavoxanthin), biomass, root length, and frond size in UV-B-exposed plants. The study confirms morphological and metabolic alterations leading to reduction in the productivity of duckweed following long-term exposure to UV-B radiation. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：408 / 414

页数：7

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