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Titre du document / Document title

Stability of rice pollination in the field under hot and dry conditions in the riverina region of New South Wales, Australia

Auteur(s) / Author(s)

MATSUI Tsutomu (1) ; KOBAYASI Kazuhiro (2) ; YOSHIMOTO Mayumi (3) ; HASEGAWA Toshihiro (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Experimental Farm, Graduate School of Agriculture, Kyoto University, 12-1, Hatchounawate, Takatsuki, Osaka 569-0096, JAPON
(2) Faculty of Life and Environmental Science, Shimane University, 1060, Nishikawatsu-chou, Matsue, Shimane 690-8504, JAPON
(3) National Institute for Agro-Environmental Sciences, 3-1-3, Kannondai, Tsukuba, Ibaraki 305-8604, JAPON

Résumé / Abstract

Even under extremely hot (40°C) conditions during anthesis, heat-induced floret sterility does not appear to be a serious issue for Australian rice growers. This contradicts previously reported temperature thresholds for floret sterility. To determine the factors associated with stable rice production under hot and dry conditions in the Riverina region of New South Wales (Australia), we examined rice (cv. 'Langi') pollination at different distances from the windward edge of a paddy field and its association with canopy microclimate. With an air temperature of 34.5°C and a relative humidity of 20.7% during anthesis, poor pollination of florets occurred at the windward edge, but pollination remained stable farther from the edge. The temperature difference between the air and the panicles in the canopy reached as high as 6.8°C under these conditions because of low humidity and strong transpirational cooling. Moreover, the length of the dehiscence at the base of the thecae during anthesis was long; this is a desirable trait for heat tolerance. The long basal dehiscence of the thecae of this cultivar and the lower panicle temperatures relative to the ambient temperature caused by high transpirational cooling appear to be the key factors responsible for stable pollination under the extremely high temperatures of the Riverina region.

Revue / Journal Title

Plant production science    ISSN  1343-943X 

Source / Source

2007, vol. 10, no1, pp. 57-63 [7 page(s) (article)] (1/2 p.)

Langue / Language

Anglais

Editeur / Publisher

Crop Science Society of Japan, Tokyo, JAPON  (1998) (Revue)

Mots-clés anglais / English Keywords

Cereal crop

;

Oceania

;

Australia

;

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Gramineae

;

Plant production

;

Cooling

;

Transpiration

;

New South Wales

;

Oryza sativa

;

Stress

;

Thermal shock

;

Thermal stress

;

Sterility

;

Flower

;

Dehiscence

;

Anther

;

Pollination

;

Stability

;

Mots-clés français / French Keywords

Plante céréalière

;

Océanie

;

Australie

;

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Gramineae

;

Production végétale

;

Refroidissement

;

Transpiration

;

Nouvelle Galles du Sud

;

Oryza sativa

;

Stress

;

Choc thermique

;

Contrainte thermique

;

Stérilité

;

Fleur

;

Déhiscence

;

Anthère

;

Pollinisation

;

Stabilité

;

Mots-clés espagnols / Spanish Keywords

Planta cerealista

;

Oceania

;

Australia

;

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Gramineae

;

Produccíon vegetal

;

Enfriamiento

;

Transpiración

;

Nueva Gales del Sur

;

Oryza sativa

;

Estrés

;

Choque térmico

;

Tensión térmica

;

Esterilidad

;

Flor

;

Dehiscencia

;

Antera

;

Polinización

;

Estabilidad

;

Mots-clés d'auteur / Author Keywords

Anther dehiscence

;

Floret sterility

;

Heat stress

;

Oryaza saliva L

;

Transpirational cooling

;

Localisation / Location

INIST-CNRS, Cote INIST : 26774, 35400014328323.0080

Nº notice refdoc (ud4) : 18569974



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