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LIGHT CONTROL OF ELONGATION OF FILAMENT IN SUNFLOWER (Helianthus annuus L.)
Author(s) -
Baroncelli S.,
Lercari B.,
Cecconi F.,
Pugliesi C.
Publication year - 1990
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1990.tb01779.x
Subject(s) - helianthus annuus , elongation , sunflower , protein filament , botany , biology , helianthus , phytochrome , white light , biophysics , horticulture , red light , materials science , physics , optics , biochemistry , metallurgy , ultimate tensile strength
— In sunflower ( Helianthus annuus L.) it has been found that continuous white‐light during the flowering stage causes loss of protandry so that filaments do not elongate. Experiments have been carried out to test the nature of the pigment involved in the photoinhibition of elongation. The results suggest that the elongation of the filament is controlled by the phytochrome system and that a low photoequilibrium is required to obtain the response. Our results do not show light control of style elongation.