Recovery from water stress in five sunflower ( Helianthus annuus L.) cultivars. I. Effects of the timing of water application on leaf area and seed production.

HOWARD M. RAWSON, N. C. Turner

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Abstract

For sunflower plants grown at a density of 5 m-2, maximum leaf areas per plant ranging between 0.2-2.2 m-2 resulted from using 5 cultivars of different maturity and imposing 4 different water treatments. Seed production increased with the number of irrigations supplied, and in the irrigated treatments it was positively correlated with time to anthesis: later cultivars yielded better. The longer duration lines were most suited to irrigation, since they permitted establishment of more leaf area. The interaction between the effects of irrigation management and plant maturity on seed yield is discussed.-from Authors

Original languageEnglish
Pages (from-to)437-448
Number of pages12
JournalAUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
Volume9
Issue number4
Publication statusPublished - 1982
Externally publishedYes

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seed productivity
Cotyledon
Helianthus
Dehydration
Helianthus annuus
water stress
leaf area
Water
Seeds
cultivars
irrigation
Water Purification
water
water treatment
irrigation management
seed yield
flowering
duration

Cite this

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AB - For sunflower plants grown at a density of 5 m-2, maximum leaf areas per plant ranging between 0.2-2.2 m-2 resulted from using 5 cultivars of different maturity and imposing 4 different water treatments. Seed production increased with the number of irrigations supplied, and in the irrigated treatments it was positively correlated with time to anthesis: later cultivars yielded better. The longer duration lines were most suited to irrigation, since they permitted establishment of more leaf area. The interaction between the effects of irrigation management and plant maturity on seed yield is discussed.-from Authors

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