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Amelioration of detrimental effects of waterlogging by foliar nutrient sprays in barley

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Pang, J and Ross, JJ and Zhou, M and Mendham, NJ and Shabala, SN (2007) Amelioration of detrimental effects of waterlogging by foliar nutrient sprays in barley. Functional Plant Biology, 34 (3). pp. 221-227. ISSN 1445-4408

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Abstract

Six barley (Hordeum vulgare L.) cultivars contrasting in their waterlogging tolerance were subjected to
waterlogging for 2 weeks under glasshouse conditions. The adverse effects of waterlogging were significantly alleviated by
the foliar spray of nutrients (quarter- or full-strength Hoagland solution) in all cultivars. Beneficial effects of nutrient sprays
included improved shoot and root growth and reduced leaf senescence. Chlorophyll content was increased, as was net CO2
assimilation, photochemical efficiency of PSII, and adventitious root production compared with waterlogged plants with
no added foliar nutrients. Auxin was found accumulated at the shoot base in waterlogged plants, and the spray of foliar
nutrients significantly increased this accumulation in waterlogged plants after 14 days of treatment. Foliar application
of 1-NAA also promoted the production of adventitious roots. The highest concentration of auxin was measured in the
stem region between 1.2 and 1.6 cm above the shoot–root junction. Foliar nutrient application also improved nitrogen and
potassium content in both shoot and root, but calcium content was hardly affected. It is concluded that the improvement
of waterlogged plant growth by foliar nutrient sprays could be related to both the improved plant nutrition and increased
auxin accumulation in the shoot base, responsible for development of adventitious roots.

Item Type: Article
Keywords: adventitious roots, auxin, barley, hormones, hypoxia, nutritional status, waterlogging stress
Journal or Publication Title: Functional Plant Biology
Publisher: CSIRO Publishing
Page Range: pp. 221-227
ISSN: 1445-4408
Identification Number - DOI: 10.1071/FP06158
Additional Information:

© CSIRO 2007

Date Deposited: 07 Apr 2008 14:21
Last Modified: 18 Nov 2014 03:34
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