Pandey, S and Kumar, Sanjay and Nagar , P K (2003) Photosynthetic performance of Ginkgo biloba L. grown under high and low irradiance. Photosynthetica, 41 (4). pp. 505-511. ISSN 0300-3604

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Abstract

Diurnal variation in net photosynthetic rate (P-N) of three-year-old plants of Ginkgo biloba was studied under open, O (receiving full sunlight), net-shade, NS (40 % of photosynthetically active radiation, PAR), or greenhouse, G (25 PAR) conditions. In all three conditions, PN was higher in morning along with stomatal conductance (g(s)), and intercellular CO2 concentration (C-i), while leaf temperature and vapour pressure deficit were low. The O-plants exhibited a typical decline in PN during midday, which was not observed in NS-plants. This indicated a possible photoinhibition in O-plants as the ratio of variable to maximum fluorescence (F-v/F-m) and photosystem 2 (PS2) yield (Phi(PS2)) values were higher in the NS- and G-plants. On the contrary, stomatal density and index, chlorophyll a/b ratio, leaf thickness, and density of mesophyll cells were greater in O-plants. Further, higher PN throughout the day along with higher relative growth rate under NS as compared to O and G suggested the better efficiency of Ginkgo plants under NS conditions. Therefore, this plant species could be grown at 40 % irradiance to meet the ever-increasing demand of leaf and also to increase its export potential.

Item Type:	Article
Uncontrolled Keywords:	Chlorophyll A Fluorescence; Leaf Anatomy; Leaf Mass; Net Photosynthetic Rate; Photoinhibition; Solar Irradiance; Stomatal Conductance; Transpiration Rata
Subjects:	Plant sciences
Divisions:	UNSPECIFIED
Depositing User:	Dr. Aparna Maitra Pati
Date Deposited:	29 Dec 2011 08:58
Last Modified:	06 Feb 2012 06:26
URI:	http://ihbt.csircentral.net/id/eprint/373

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