Organogenic response of photomorphogenic mutants of tomato

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dc.contributor.author Tyburski, Jarosław
dc.contributor.author Tretyn, Andrzej
dc.date.accessioned 2015-08-03T10:51:25Z
dc.date.available 2015-08-03T10:51:25Z
dc.date.issued 1999-10-01
dc.identifier.citation Journal of Plant Physiology vol. 155 (4-5), 1999, pp. 568-575.
dc.identifier.issn 0176-1617
dc.identifier.uri http://repozytorium.umk.pl/handle/item/2905
dc.description.abstract The effect of white (WL) and red (RL) light on organogenesis in vitro was studied using explants isolated from seedlings of wild-type (WT) and two photo morphogenic mutants of tomato (Lycopersicon esculentum Mill.) - aurea (au) and high pigment (hp). Explants excised from hypocotyls and cotyledons of green and etiolated seedlings were cultured on shoot or root inducing media. It was observed that both continuous white (CWL) and red light (CRL) stimulate shoot formation on hypocotyl explants isolated from green seedlings ofWT and hp plants compared with control ones cultured in darkness. On the other hand, au mutant shows very low organogenetic response in spite of light conditions applied. Explants isolated from both green and etiolated seedlings were not able to form shoots when they were cultured in darkness. In contrast to green explants, etiolated ones formed roots in spite of being grown on a shoot inducing medium. Root regeneration from etiolated explants was stimulated by short, 5-min-long daily pulses of RL. This effect was reversed by subsequent far-red light (FRL) irradiation. Stimulation of shoot regeneration from etiolated explants was found when 2-h-long daily irradiation with WL or RL was applied. The highest and the lowest shoot regeneration response was obtained from hp and au explants, respectively, with an intermediate response from WT. Under the same growth conditions shoot formation was accompanied by root formation, which also occurred in a light dependent manner. The highest number of roots regenerated from au-derived explants. The results that we have obtained may suggest that shoot formation is strongly dependent on the light sensitivity of plants and light conditions applied. It also seems that the pattern of organ (shoot and root) development in tomato is affected by the etiolated/deetiolated phenotype of explant. Therefore, we
dc.language.iso eng
dc.publisher Urban & Fisher
dc.rights Attribution-NonCommercial-NoDerivs 3.0 Poland
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/pl/
dc.subject In vivo
dc.subject Organogenesis
dc.subject Photomorphogenesis
dc.subject Photomorphogenic mutants
dc.subject phytochrome
dc.subject root regeneration
dc.subject shoot regeneration
dc.subject tomato
dc.title Organogenic response of photomorphogenic mutants of tomato
dc.type info:eu-repo/semantics/article

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