dc.contributor.author | Sağlam, Serap | |
dc.contributor.author | Dalyan, Eda | |
dc.date.accessioned | 2021-03-06T19:50:45Z | |
dc.date.available | 2021-03-06T19:50:45Z | |
dc.identifier.citation | Dalyan E., Sağlam S., "The effect of epibrassinolide on senescence in horizontal sunflower (Helianthus annuus L.) seedlings", IUFS Journal of Biology, cilt.1, ss.33-44, 2013 | |
dc.identifier.issn | 1300-7041 | |
dc.identifier.other | vv_1032021 | |
dc.identifier.other | av_f840b001-da21-43b9-979b-2868e6405c4f | |
dc.identifier.uri | http://hdl.handle.net/20.500.12627/162632 | |
dc.identifier.uri | https://avesis.istanbul.edu.tr/api/publication/f840b001-da21-43b9-979b-2868e6405c4f/file | |
dc.description.abstract | This study examined the effect of epibrassinolide (eBL) on senescence occurring in cotyledons of sunflower
(Helianthus annuus L.) seedlings, which were kept in vertical and horizontal positions. 10-11 M and 10-9
M eBL and 2,3,5-triiodobenzoic acid (TIBA), an inhibitor of auxin transport, were sprayed to the 14
days old seedlings. From the 15th day on, some of the seedlings from the control and the experimental
groups were kept in a horizontal position, and senescence process of the cotyledons of these seedlings
was observed. Applications of eBL (especially 10-9 M) were found to have induced senescence both
in horizontally and vertically positioned plants. When it was applied with TIBA, a marked delay of
senescence was noted in the lower cotyledons of the horizontally positioned plants. Total chlorophyll
and protein amounts and peroxidase activity were determined. In case brassinosteroids are applied with
TIBA, they do not affect senescence, implying that they accelerate senescence in the presence of auxin.
Since auxin is distributed asymmetrically, eBL and auxin accumulated in the lower cotyledons may lead
to accelerated senescence. This study showed that eBL and auxin may act as a senescence signal in the
vertically and horizontally positioned seedlings, and earlier death of the lower cotyledons than the upper
ones may be a result of asymmetrical auxin distribution. In this study, it was revealed that promoting
effect of eBL on senescence occured only in the presence of auxin.
Keywords: eBL – Epibrassinolide, TIBA - 2,3,5-triiodobensoic acid, Auxin, Senescence, Sunflower
(Helianthus annuus L.).
*Corresponding Author: Serap Sağlam-Çağ (e-mail:sercag@istanbul.edu.tr)
(Received: 13.09.2012 Accepted: 04.03.2013) | |
dc.language.iso | tur | |
dc.subject | Yaşam Bilimleri | |
dc.subject | Bitki Biyolojisi | |
dc.subject | Bitki Fizyolojisi | |
dc.subject | Temel Bilimler | |
dc.subject | BİTKİ BİLİMLERİ | |
dc.subject | ÇOK DİSİPLİNLİ BİLİMLER | |
dc.subject | Doğa Bilimleri Genel | |
dc.subject | Bitki ve Hayvan Bilimleri | |
dc.subject | Yaşam Bilimleri (LIFE) | |
dc.subject | Temel Bilimler (SCI) | |
dc.subject | Tarım ve Çevre Bilimleri (AGE) | |
dc.title | The effect of epibrassinolide on senescence in horizontal sunflower (Helianthus annuus L.) seedlings | |
dc.type | Makale | |
dc.relation.journal | IUFS Journal of Biology | |
dc.contributor.department | İstanbul Üniversitesi , Fen Fakültesi , Biyoloji Bölümü | |
dc.identifier.volume | 1 | |
dc.identifier.startpage | 33 | |
dc.identifier.endpage | 44 | |
dc.contributor.firstauthorID | 1788540 | |