EFFECT OF EXOGENOUS APPLICATION OF ABA AND CK AT DIFFERENT STAGES OF GRAIN DEVELOPMENT ON SOME PHYSIOLOGICAL ASPECTS OF SOURCE AND SINK RELATIONSHIP IN TWO BREAD WHEAT CULTIVARS

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SAEIDI MOHSEN; MORADI FOUAD; AHMADI ALI; POUSTINI K.; NAJAFIAN G.

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Journal: Iranian Journal of Crop Sciences Year:2006 | Volume:8 | Issue:3 (31) Page(s): 268-282

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Title

EFFECT OF EXOGENOUS APPLICATION OF ABA AND CK AT DIFFERENT STAGES OF GRAIN DEVELOPMENT ON SOME PHYSIOLOGICAL ASPECTS OF SOURCE AND SINK RELATIONSHIP IN TWO BREAD WHEAT CULTIVARS

Author(s)

Keywords

BREAD WHEATQ3

CYTOKININQ3

ABSCISIC ACID (ABA)Q3

INDOL ACETIC ACID (IAA)Q3

SOLUBLE PROTEINQ2

PHOTOSYNTHESISQ2

Abstract

Plant growth regulators are the most important internal regulatory agents that adjust plant growth and development in relationship to genetic and environmental conditions. Among the plant growth regulators, CYTOKININs (CK) and abscisic acid (ABA) not only regulating the process of senescence and remobilization, but also have major roles on formation of sink and source strength and capacity. This study carried out to determine effect of exogenous application of CK and ABA (50mM) on some physiological aspects of source and sink strength of two wheat cultivars (Marvdasht, Zagros), using a split plot arrangement based on Randomized Complete Block Design (RCBD) with three replications, in experimental field of the university of Tehran, in 2005-2006 growing season. Results showed that when these plant growth regulators applied at different stages of grain growth including cell division (CD) and grain filling (GF), grain yield, biomass, harvest index (HI), 1000 grain weight and grain no. spike-1, significantly changed. Application of CK at CD stage, led to higher grain yield, biomass and grain no. spike-1. However, ABA at GF stage and CK at CD stage increased HI and significantly affected SOLUBLE PROTEINs, chlorophyll content, PHOTOSYNTHESIS rate, stomatal conductance and ABA and CK concentrations in flag leaves. In contrary, exogenous application of ABA increased ABA concentration of developing grains, while had inverse effect on IAA of the same grains. It can be concluded that exogenous application of CK at cell division stage in grain growth phase may significantly improve biomass and grain yield.

Cites

BIOCHEMICAL RESPONSES OF TWO WHEAT CULTIVARS TO LATE SEASON DROUGHT STRESS AND AUXIN AND CYTOKININ APPLICATION

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APA: Copy

SAEIDI, MOHSEN, MORADI, FOUAD, AHMADI, ALI, POUSTINI, K., & NAJAFIAN, G.. (2006). EFFECT OF EXOGENOUS APPLICATION OF ABA AND CK AT DIFFERENT STAGES OF GRAIN DEVELOPMENT ON SOME PHYSIOLOGICAL ASPECTS OF SOURCE AND SINK RELATIONSHIP IN TWO BREAD WHEAT CULTIVARS. IRANIAN JOURNAL OF CROP SCIENCES, 8(3 (31)), 268-282. SID. https://sid.ir/paper/57435/en

Vancouver: Copy

SAEIDI MOHSEN, MORADI FOUAD, AHMADI ALI, POUSTINI K., NAJAFIAN G.. EFFECT OF EXOGENOUS APPLICATION OF ABA AND CK AT DIFFERENT STAGES OF GRAIN DEVELOPMENT ON SOME PHYSIOLOGICAL ASPECTS OF SOURCE AND SINK RELATIONSHIP IN TWO BREAD WHEAT CULTIVARS. IRANIAN JOURNAL OF CROP SCIENCES[Internet]. 2006;8(3 (31)):268-282. Available from: https://sid.ir/paper/57435/en

IEEE: Copy

MOHSEN SAEIDI, FOUAD MORADI, ALI AHMADI, K. POUSTINI, and G. NAJAFIAN, “EFFECT OF EXOGENOUS APPLICATION OF ABA AND CK AT DIFFERENT STAGES OF GRAIN DEVELOPMENT ON SOME PHYSIOLOGICAL ASPECTS OF SOURCE AND SINK RELATIONSHIP IN TWO BREAD WHEAT CULTIVARS,” IRANIAN JOURNAL OF CROP SCIENCES, vol. 8, no. 3 (31), pp. 268–282, 2006, [Online]. Available: https://sid.ir/paper/57435/en

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