Photosynthetica 1998, 35(3):335-343 | DOI: 10.1023/A:1006952032464
Differential Responses of Growth and Photosynthesis in Cyamopsis Tetragonoloba L. Grown under Ultraviolet-B and supplemental long-wavelength radiations
- 1 School of Biological Sciences, Madurai Kamaraj University, Madurai, India
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. UV-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 photoreactive the UV-B damage whereas a positive photoregulatory effect of UV-A was noticed in electron transport rates and low temperature fluorescence emission spectra.
Additional key words: chlorophyll fluorescence induction; photoreactivation; post-irradiation; photosystems 1 and 2
Prepublished online: September 1, 1998; Published: January 1, 1998 Show citation
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