Effect of drought stress on photosynthetic rate of four rapeseed (Brassica napus) cultivars.

Book Title: NA
Year Published: 2008
Month Published: NA
Author: Naderikharaji, R. ; Pakniyat, H. ; Biabani, A. R.
Book Group Author: NA
Abstract:

A greenhouse pot experiment was conducted in Iran in 2006 to investigate the SPAD meter reading variations of rapeseed leaves under different treatments. Treatments were various rapeseed cultivars (Hayola 401, Hayola 308, Option and RGS) and irrigation regimes (FC (non-stress), 75 FC, 50 FC and 25% FC). With increase in drought stress, the SPAD meter readings (the relative chlorophyll concentration of leaves) were decreased. Drought stress had a significant effect on net photosynthesis (A), stomatal conductance (gs) intercellular CO2 concentration (Ci) and leaf area (LA) of rapeseed at both vegetative and flowering stages. In general, Hayola 401, had the highest yield in both control and drought treatments, followed by Hayola 308, whereas RGS had the lowest yield among the cultivars. Hayola 401 and Hayola 308, had the highest gs in control and the lowest gsin drought treatments. Cultivars tolerance rankings in this study, was Hayola 401, Hayola 308, Option and RGS. Information obtained in this study may be useful for breeders to introduce suitable drought resistant rapeseed cultivars under arid regions.

Pages: 4460 - 4463
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20083332349&site=ehost-live
Volume: 8
Number: 23
Journal: Journal of Applied Sciences
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 1812-5654
DOI: NA
Keywords:

carbon dioxide, chlorophyll, crop yield, cultivars, drought,drought resistance, irrigation, leaf area, leaf conductance, leaves,photosynthesis, plant water relations, rape, stomata, swede rape, waterstress, Iran, Brassica napus var. oleifera, Brassica napus, Brassica,Brassicaceae, Capparidales, dicotyledons, angiosperms, Spermatophyta,plants, eukaryotes, West Asia, Asia, Middle East, Developing Countries,Threshold Countries, canola, Capparales, carbon assimilation, carbondioxide fixation, cultivated varieties, drought tolerance, oilseed rape,watering, Field Crops (FF005) (New March 2000), Plant Breeding andGenetics (FF020), Plant Physiology and Biochemistry (FF060), Plant WaterRelations (FF062), Plant Production (FF100), Environmental Tolerance ofPlants (FF900)

Source: EBSCO
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