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Temperature‐induced Alterations in the Expression of Susceptibility of Cassava to Colletotrichum gloeosporioides f. sp. manihotis
Author(s) -
Bruggen P. van der,
Gregoire D.,
Maraite H.
Publication year - 1990
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.1439-0434.1990.tb01152.x
Subject(s) - biology , cultivar , colletotrichum gloeosporioides , mycelium , manihot esculenta , inoculation , horticulture , agar , potato dextrose agar , colletotrichum , botany , genetics , bacteria
Cassava plants ( Manihot esculenta Crantz) were incubated at 15, 25 or 35 °C after inoculation of green stems with Colletotrichum gloeosporioides (Penz.) f. sp. manihotis Chev. At 25 °C, the cultivar TMS 30211 was less susceptible than the cultivar TMS 30337. At 35 °C, compared to 25 °C, the lesion diameter was reduced in both cultivars, the cassava stem extracts showed an enhanced fungitoxicity, the grem tubes were more sensitive to the stem extracts and a layer of lignified, cells developed earlier around the infected tissues. At 15 °C, the lesions in both cultivars extended more rapidly than at the other temperatures, even though 15 °C, compared to 25 °C, caused a 50% reduction of mycelial growth rate on oat meal agar.