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Allelopathic Effect of Conyza albida on Avena sativa and Spirodela polyrhiza
Author(s) -
Economou G.,
Tzakou O.,
Gani A.,
Yannitsaros A.,
Bilalis D.
Publication year - 2002
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1046/j.1439-037x.2002.00565.x
Subject(s) - allelopathy , radicle , avena , inflorescence , biology , bioassay , germination , botany , dry weight , phytotoxicity , rosette (schizont appearance) , agronomy , immunology , genetics
The allelopathic influence of four plant tissues of Conyza albida (stems, leaves and inflorescences) on oat growth were investigated using in vivo tests. Oat growth (fresh and dry weights of above and underground parts) was inhibited from phytotoxic activity of upper leaves and inflorescence tissues of C. albida in pot studies. The inhibition was significantly higher than in the other tissues studied. The inhibiting action of crude extracts and volatile compounds from young plants (rosette) and mature plants were examined using two bioassay methods: (a) seed germination and radicle growth of oat and (b) fresh weight of duckweed plants. Both bioassayed species exhibited greater phytotoxic response from the young plants, collected in winter, than from the mature ones.