Leaf Water Potential, Relative Water Content, and Diffusive Resistance as Screening Techniques for Drought Resistance in Barley

Autor:	Hayden Ferguson, M. A. Matin, Jarvis H. Brown
Rok vydání:	1989
Předmět:	Resistance (ecology) Agronomy Chemistry Drought resistance Semi-arid climate Poaceae Cultivar Hordeum vulgare Leaf water Agronomy and Crop Science Water content
Zdroj:	Agronomy Journal. 81:100-105
ISSN:	1435-0645 0002-1962
DOI:	10.2134/agronj1989.00021962008100010018x
Popis:	At the three-leaf growth stage total leaf water potential (ψ t ) was measured on the third leaf of each plant under low stress conditions (predawn). Water was then drained from the sand bed to stress the plants. Leaf diffusive resistance (LDR) was measured at 1000 and 1300 h each day as stress developed. When the PM diffusive resistance reached about 1000 sm 1 , relative water content (RWC) of the second leaf was determined. Neither RWC nor LDR allowed separation of cultivars within resistant or susceptible groups, but ψ t did show differences between cultivars within groups. These techniques provide an easy method to screen for drought-resistant barley
Databáze:	OpenAIRE
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