Search Result of "plant growth regulators"

About 47 results
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งานวิจัย

การวิเคราะห์ฮอร์โมนพืชในหัวกวาวเครือขาว (Pueraria mirifica) (2007)

หัวหน้าโครงการ:Imgนางสาวสมนึก พรมแดง

แหล่งทุน:ทุนอุดหนุนวิจัยมก.

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ผลงานตีพิมพ์ในวารสารวิชาการ

Synergistic effects of some plant growth regulators on in vitro shoot proliferation of korarima (Aframomum corrorima (Braun) Jansen)

ผู้แต่ง:ImgTefera, W, ImgDr.Surawit Wannakrairoj, Associate Professor,

วารสาร:

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ผลงานตีพิมพ์ในวารสารวิชาการ

Synthesis and preliminary evaluation of dimeric-28-homobrassinosteroids for plant growth regulators

ผู้แต่ง:ImgWaya S. Phutdhawong, ImgWanwikar Ruensamran, ImgDr.Weerachai Phutdhawong, Associate Professor,

วารสาร:

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การประชุมวิชาการ

Effect if Foliar Application of Sugars and Plant Growth Regulators on Flower Quality of Jasmine (Jasminum sambac Ait) in Cool Season

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การประชุมวิชาการ:

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การประชุมวิชาการ

Effects of culture media and plant growth regulators on callus induction of Curcuma longa L.

ผู้แต่ง:

การประชุมวิชาการ:

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Plant Growth Regulators and Explant Types on Callus Formation in African Yam Bean (Sphenostylis stenocarpa (Hochst. Ex A. Rich) Harms))

ผู้เขียน:ImgSikirat Remi Akande, ImgMorufat Oloruntoyin Balogun, ImgBenjamin Adefemi Ogunbodede

สื่อสิ่งพิมพ์:pdf

Abstract

This study was conducted to investigate the effect of explant types and plant growth regulator regimes on callus induction in African yam bean, with a view to developing protocols for regeneration. Leaf, stem and root explants of African yam bean were cultured in media containing different types and concentrations of plant growth regulators (PGR). The explants were observed for callus formation after three months. The main effects of variety, explant and plant growth regulator regimes and their interactions were highly significant. Highest callus formation was recorded in stem explant while the root explant had the lowest. The accession, SSSWN56 (brown seed) had higher percentage callus formation than SSSWN75 (grey seed). No callus was formed in hormone-free medium and the media containing indole acetic acid (IAA). One- hundred-percent callus formation was recorded for both accessions in the medium containing 1.5 mg/l each of kinetin and Naphthalene acetic acid (NAA). This medium is recommended for callus induction using stem explant and it will be useful in perfecting regeneration protocols for African yam bean.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 043, Issue 3, Jul 09 - Sep 09, Page 442 - 448 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Position and Plant Growth Regulators on Morphogenesis and Growth Rate of Coconut Endosperm In Vitro)

ผู้เขียน:ImgLazarus Agus Sukamto

สื่อสิ่งพิมพ์:pdf

Abstract

Endosperm position (antipodal and micropylar) and plant growth regulators were investigated for their effect on morphogenesis and the growth rate of coconut endosperm cultured in vitro. This experiment was conducted at the Tissue Culture Laboratory, Horticulture Department, University of Hawaii at Manoa, USA. Embryo companion and plant growth regulators were not necessary to induce callogenesis. Coconut endosperm explants started to form callus after 3 wk of culture. Callogenesis occurred in 98.83% of all treatments on 31 wk of culture. Endosperm positions and plant growth regulators did not affect signifi cantly the growth rate of the endosperm culture. The concentration of 2,4-dichlorophenoxyacetic acid (2,4-D) and 4-amino-3,5,6-trichloropicolinic acid (picloram) at 1 ? 10-3 M affected signifi cantly the growth rate after 9 wk of culture but did not inhibit thereafter. The growth rate of the control was the quickest on 31 wk of culture. Addition of 6-benzylaminopurine (BAP) did not affect signifi cantly the growth rate of the endosperm culture. The growth rate of tissues increased substantially but decreased on 31 wk of culture. Embryo-like structures appeared from antipodal position calli treated with 1 ? 10-6 M picloram. This study has provided the fi rst report of embryo-like structures occurring on coconut endosperm cultured in vitro.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 045, Issue 6, Nov 11 - Dec 11, Page 977 - 984 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influence of Plant Growth Regulators on Morphological, Floral and Yield Traits of Cucumber (Cucumis sativus L.))

ผู้เขียน:ImgMukesh Thappa, ImgSatesh Kumar, ImgRomisa Rafiq

สื่อสิ่งพิมพ์:pdf

Abstract

The possibility was examined of altering the plant frame and inducing femaleness at early stages in the development of cucumber for productivity enhancement and early development using various plant growth regulators at the Vegetable Experimental Farm, Division of Vegetable Science and Floriculture, S.K. University of Agricultural Sciences and Technology of Jammu, India during the springsummer season of 2009. Three plant growth regulators were sprayed onto plants at the two-, four- and six-leaf and full-bloom stage using the cucumber variety Cucumber Long Green. Two of the growth regulators, maleic hydrazide and ethephon, were each applied at two different concentrations of 100 and 200 ppm and the third, naphthalene acetic acid, was applied at 50 and 100 ppm, and some combined applications of growth regulators were also tested. The experiment comprised 15 treatments and was laid out in a randomized block design with three replications. The results revealed that the influence of the plant growth regulators was variable on the morphological traits of cucumber but the floral and yield traits were significantly affected by a combined application of 100 ppm maleic hydrazide and 100 ppm ethephon. This treatment induced early development, maximized the sex ratio with regard to yield and was comparatively helpful in reducing plant expansion. This treatment also produced the best economic results for the production of cucumber.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 045, Issue 2, Mar 11 - Apr 11, Page 177 - 188 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Control of Sex Expression in Cucumber by Photoperiod, Defoliation, and Plant Growth Regulators)

ผู้เขียน:Imgดร.คณพล จุฑามณี, รองศาสตราจารย์, ImgTakashi Saito, Imgดร.สุรนันต์ สุภัทรพันธุ์, ศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

Influences of photoperiod, defoliation, and growth regulators (AgNO3, ethephon, gibberellic acid, and uniconzole) on sex expression were observed in three cultivars of cucumber, Cucumis sativus L. Eight photoperiod (SD) condition increased number of pistillate flowers and decreased number of staminate flowers in a monoecious cucumber, ‘Sagami-hanjiro’ Defoliation increased number of staminate flowers under SD. Ethephon decreased number of staminate flowers under SD, but had no effect under 24 h light photoperiod (LD) in defoliated plant. Gibberellic acid (GA) increased number of staminate flowers regardless of photoperiod and defoliation. LD slightly increased number of staminate flowers in a monoecious ‘Otone No.1’. Defoliation significantly decreased number of pistillate flowers under LD. Ethephon decreased number of staminate flowers and increased pistillate flowers under both photoperiodic conditions. The effect of ethephon was nullified by defoliation. Uniconazole markedly decreased number of staminate flowers and increased pistillate flowers regardless of photoperiod and defoliation. Uniconazole also induced bisexual flowers. Agynoecious cucumber, ‘Rensei’ produced almost only pistillate flowers under both SD and LD, and this tendency was not affected by defoliation. AgNO3 induced staminate flowers and decreased number of pistillate flowers under LD and also under SD if defoliated. GA3 decreased number of pistillate flowers in all treatments by causing blind nodes where neither floral nor vegetative buds developed.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 028, Issue 4, Oct 94 - Dec 94, Page -  |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Plant Growth Regulators on Papayas (Carica Papaya) Cultured in vitro)

ผู้เขียน:Imgดร.สายชล เกตุษา, ศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

Micropropagation of papaya variety “Khag Dum” and “Solo” was obtained by culturing papaya shoot apices and buds on modified MS medium containing 0.5 mg/1 BA and 0.2 mg/1 NAA. The increasing rate of multiple shoots was about 7 folds of plants during subculturing periods. The papaya plantlets approximately 2-3 cm. in height could be rooted on MS medium with 1.5 mg/1 IBA. After subculturing these shoots onto the same medium more than one years, the vitrification of shoots and plantlets was observed. Futher multiplication and rooting of vitrified papaya shoots and plantlets was unsuccessful. Therefore, interchangeable of the media containing white 0-5 mg/1 kinetin, 15% coconut water, and 0-0.2 mg/1 NAA were substituted for subculturing. Papaya plantlets were best geown on MS medium containing 15% coconut water, 0.1 mg/1 NAA, and 120 mg/1 adenine sulfate. About 80% of these plantlets were successfully rooted on MS medium with 1.5 mg/1 IBA.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 5, Jan 88 - Dec 88, Page 1 - 6 |  PDF |  Page 

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