Open AccessPseudo‐compatibility in Tradescantia paludosa
Author(s) -
QARAÉEN ARIF M.
Publication year - 1982
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1982.tb00034.x
Subject(s) - pollen , tradescantia , biology , gynoecium , inflorescence , botany , clone (java method) , pollen tube , stamen , pollination , gene , genetics
Two clones of Tradescantia paludosa, S 1 S 2 and S 3 S 4 , were investigated for impairment of self‐incompatibility after X‐irradiation. Inflorescences were exposed to X‐rays in a series of doubled doses ranging from 50r to 1600r, and pollen from opening irradiated flowers was applied to unirradiated pistils from the same clone during an 8‐day period. In clone S 3 S 4 self seed set was only caused by pollen from buds irradiated at stages in microsporogenesis preceding the first pollen mitosis, at a rate corresponding to 5–20 seeds per 10 5 pollen grains applied. In clone S 1 S 2 even pollen obtained from flowers irradiated at the binucleate stages of microsporogenesis caused self seed‐set, 50–200 seeds per 10 5 pollen grains applied. Irradiated pistils pollinated with unirradiated self pollen gave no seed‐set, whereas self seed‐set was obtained when both pistil and pollen had been irradiated.