The effects of zinc (Zn) and C14-indoleacetic acid (IAA) on leaf senescence ın Helıanthus annuus L. | Zendy

Sağlam-ağ Serap | Zendy; Okatan Yener | Zendy

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The effects of zinc (Zn) and C14-indoleacetic acid (IAA) on leaf senescence ın Helıanthus annuus L.

Author(s) -

Sağlam-ağ Serap,

Okatan Yener

Publication year - 2014

Publication title -

international journal of plant physiology and biochemistry

Language(s) - English

Resource type - Journals

ISSN - 2141-2162

DOI - 10.5897/ijppb2014.0204

Subject(s) - helianthus annuus , senescence , sunflower , cotyledon , indole 3 acetic acid , zinc , biology , botany , horticulture , chemistry , biochemistry , microbiology and biotechnology , auxin , organic chemistry , gene

Sequential leaf senescence is defined as a kind of programmed death events which is an important process in growth of plant. This study aimed to explore the sequential leaf senescence rate due to indoleacetic acid and lack of zinc (-Zn). Therefore, the effect of zinc and indole-3-acetic acid on senescence which occurs in Helianthus annuus (sunflower) cotyledons was analyzed. It was found that in cotyledons of seedlings grown in Hoagland solution which was prepared without addition of zinc senescence is delayed. It was recognised that in case of 14C indoleacetic acid (IAA) which was given from apical tip not reaching the root and cotyledons, senescence does not occur in cotyledons. It was studied to get more information about physiological system of sequential leaf senescence. Key words: Sequential leaf senescence, cotyledon, zinc, 14C indole-acetic acid (IAA), Helianthus annuus (sunflower).

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