Indoleacetic acid (IAA) induced changes in growth, relative water contents and gas exchange attributes of barley (Hordeum vulgare L.) grown under water stress conditions.

Book Title: NA
Year Published: 2006
Month Published: NA
Author: Ashraf, M. Y. ; Nazila, Azhar ; Hussain, M.
Book Group Author: NA

Effect of different concentrations of indole acetic acid (IAA) under varying soil water deficit conditions on two barley cultivars viz. B-99094 and Jau-87 was investigated in soil filled earthen pots. There were six treatments including control each with four replicates. Three concentrations of IAA (0, 15 and 30 mg l-1) were applied as foliar spray 30 days after germination. After hormone application, half of the pots were subjected to one cycle of water stress (withholding of water till incipient wilting), followed by regular watering. Plant height, photosynthetic rate, transpiration rate, stomatal conductance, water use efficiency relative water content, dry biomass, and grain yield/plant were significantly reduced by water stress. However, IAA treatments alleviated the adverse effect of water stress and successful in enhancing the plant growth and yield of barley cultivars. Barley cultivar Jau-87 performed better than B-99094. IAA application was effective in enhancing growth and photosynthetic efficiency of barley both under normal and water stress conditions.

Pages: 85 - 90
Volume: 50
Number: 1
Journal: Plant Growth Regulation
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0167-6903

application rates, barley, biomass, crop yield, droughtresistance, dry matter, gas exchange, growth, IAA, leaf conductance,photosynthesis, plant growth regulators, plant height, plant waterrelations, stomata, transpiration, water content, water deficit, waterstress, water use efficiency, Hordeum vulgare, Hordeum, Poaceae,Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, carbon assimilation, carbon dioxide fixation, droughttolerance, indoleacetic acid, indolylacetic acid, plant growthsubstances, plant hormones, Field Crops (FF005) (New March 2000), PlantWater Relations (FF062), Plant Production (FF100), EnvironmentalTolerance of Plants (FF900)

Source: EBSCO
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