The effects of δ -aminolevulinic acid and inhibitors of RNA and protein synthesis on phytochrome mediated chlorophyll accumulation in Sorghum bicolor

Rajshekar, V. K. ; Guha-Mukherjee, Sipra ; Sopory, Sudhir K. (1983) The effects of δ -aminolevulinic acid and inhibitors of RNA and protein synthesis on phytochrome mediated chlorophyll accumulation in Sorghum bicolor Journal of Experimental Botany, 34 (11). pp. 1444-1454. ISSN 0022-0957

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Official URL: http://jxb.oxfordjournals.org/cgi/content/abstract...

Related URL: http://dx.doi.org/10.1093/jxb/34.11.1444

Abstract

In 5 - d - old etiolated seedlings of Sorghum bicolor, 12 h of darkness after 5 min in red light eliminated a lag before the accumulation of chlorophylls in subsequent continuous white light. Increasing the dark period to 24 h and 36 h, increased the rate of chlorophyll accumulation in the later stages of greening. Exogenous δ - aminolevulinic acid neither completely removed the lag, nor increased the rate of chlorophyll accumulation. Cycloheximide (25 µg ml-1) and 6 - methyl purine (5.0 µg ml-1), given continuously or only until the 12 h dark period following the red light irradiation, restored the lag and decreased the rate of chlorophyll accumulation. D - threo - chloramphenicol (400 µg ml-1) also decreased the rate of chlorophyll accumulation but did not restore the lag. Addition of these inhibitors even 12 h after red light irradiation decreased the rate of chlorophyll accumulation. Rifampicin (Rifamycin SV, 400 µg ml-1) did not have such effects.

Item Type:Article
Source:Copyright of this article belongs to Oxford University Press.
Keywords:Chlorophylls; Phytochrome; δ-aminolevulinic Acid; Sorghum bicolor
ID Code:15648
Deposited On:13 Nov 2010 12:47
Last Modified:02 Jun 2011 07:44

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