Hernández LF1,2, PM Bellés3, MA Bidegain4,5, PD Postemsky4
Phyton-International Journal of Experimental Botany, Vol.87, pp. 198-208, 2018, DOI:10.32604/phyton.2018.87.198
Abstract Absence or underdevelopment of sunflower fruits
come usually from failure in fertilization, stresses as well as physiological
and morphological defects in the ovary. Thigmomorphogenesis
has never been included as a possible cause. We have previously
shown that a 2-3 day fertilization shift can occur between neighboring
florets in the sunflower capitulum. It is proposed here that
those ovaries with advanced fertilization can generate a significant
radial and axial compressive stress on ovaries with delayed fertilization.
This mechanical stimulus could be strong enough to trigger a
thigmo response that affects further ovary development. In vivo tests
were performed, isolating ovaries by… More >
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