Premium
Microscopic Observation on the Development of Puccinia striiformis in the Spike and Stem of Wheat
Author(s) -
Wang Chenfang,
Zhang Hongchang,
Buchenauer Heinrich,
Kang Zhensheng
Publication year - 2011
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.2010.01760.x
Subject(s) - biology , appressorium , epidermis (zoology) , parenchyma , stem rust , hypha , germ tube , botany , urediniospore , vascular bundle , glume , fungus , caryopsis , puccinia striiformis , germination , anatomy , cultivar
The majority of germ tubes of the pathotype CYR32 of Puccinia striiformis f.sp. tritici formed on the surface of spike organs of the susceptible wheat cv. Suwon 11 penetrated through the stomatal pore, only a few germ tubes formed small appressoria over the stomata. In the lemma, palea and glume, the stripe rust fungus spread between the parenchyma cells close to the inner epidermal layer, but the fungus did not develop between the thick‐walled cells near the outer epidermal layer of these organs. In the awn and stem, spread of the stripe rust was confined to the intercellular spaces of the chlorophyll parenchyma, beneath the invaded stomatal pore of the epidermis and the urediniospores to be released disrupted the epidermis. In the caryopsis, the spread of hyphae was restricted to the intercellular spaces of the pericarp cells.