Differential responses of growth and photosynthesis in Cyamopsis tetragonoloba L. grown under ultraviolet-B and supplemental long-wavelength radiations

被引：10
|
作者：
Lingakumar, K [1 ]
Kulandaivelu, G [1 ]
机构：
[1] Madurai Kamaraj Univ, Sch Biol Sci, Madurai 625021, Tamil Nadu, India
来源：
PHOTOSYNTHETICA | 1998年 / 35卷 / 03期
关键词：
chlorophyll fluorescence induction; photoreactivation; post-irradiation; photosystems; 1; and; 2;
D O I：
10.1023/A:1006952032464
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Cyamopsis tetragonoloba L. seedlings were subjected to continuous ultraviolet (UV)-B radiation for 18 h and post-irradiated with "white light" (WL) and UV-A enhanced fluorescent radiations. W-B treatment alone reduced plant growth, pigment content, and photosynthetic activities. Supplementation of UV-A promoted the overall seedling growth and enhanced the synthesis of chlorophyll and carotenoids with a relatively high photosystem 1 activity. Post UV-B irradiation under WL failed to photoreactivate the UV-B damage whereas a positive photoregulatory effect of UV-A was noticed in electron transport rates and low temperature fluorescence emission spectra.
引用
收藏
页码：335 / 343
页数：9
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