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Reaction of Germinating Maize Pollen to Helminthosporium maydis Pathotoxins 1
Author(s) -
Laughnan J. R.,
Gabay S. J.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300060028x
Subject(s) - pollen , germination , biology , cytoplasm , zea mays , botany , bioassay , in vitro , agronomy , microbiology and biotechnology , genetics
Pollen from fertile plants of corn ( Zea mays L.), with normal and restored male‐sterile cytoplasm ( cms ), from various sources was assayed for in vitro germination on media containing Helminthosporium maydis pathotoxins extracted from infected leaves. The “pathotoxin” from H. maydis race O inhibited neither germination nor growth of pollen from any of the cms or normal cytoplasm sources tested, as compared with controls. The pathotoxin from H. maydis race T, however, inhibited in vitro germination and growth of pollen from cms‐T and cms‐P plants. Growth of pollen from cms‐C , cms‐S and normal cytoplasm sources was not inhibited by race T pathotoxin. The advantages of a pollen bioassay are discussed, as are possible special applications of this procedure.