Dale, M.L., and Irwin, J.A.G. (1991) Stomata as an infection court for Phytophthora megasperma f. sp. medicaginis in chickpea and a histological study of infection. Phytopathology, 81 (4). pp. 375-379.

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Abstract

Stomata located beneath the cotyledons of 7-day-old chickpea seedlings were the preferential infection court for zoos pores of Phytophthora megasperma f. sp. medicaginis. Zoospores also accumulated preferentially in the root-hair zone. Penetration usually was intercellular between anticlinal epidermal cell walls, but intracellular penetration did occur via infection pegs produced from swollen germ-tube tips. Although no differences in prepenetration or penetration events were found between a field resistant (CPl56564} and a susceptible cuhivar (ICC6334} of chickpea, hyphal growth rate of the fungus was greater through wounded roots of the susceptible cultivar than in the resistant cultivar. There was no significant difference between hyphal growth rates through wounded epicotyl tissue of the resistant and susceptible cultivars. Stomata located at or below the soil line could act as an infection court for zoospores present in surface water, and cultivars that express resistance in the root tissue would appear susceptible if the resistance was not also expressed in the hypocotyl and the lower epicotyl. A soil-line infection court also could be involved in spreading the disease via zoospores present in surface water in the field.

Item ID:	54124
Item Type:	Article (Research - C1)
ISSN:	1943-7684
Date Deposited:	31 Jul 2018 00:37
FoR Codes:	06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060704 Plant Pathology @ 80% 07 AGRICULTURAL AND VETERINARY SCIENCES > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds) @ 20%
SEO Codes:	82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8205 Winter Grains and Oilseeds > 820599 Winter Grains and Oilseeds not elsewhere classified @ 100%
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