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Author: search.filters.author.Saetiew, K.Subject: search.filters.subject.Plant growth regulator

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    Effect of paclobutrazol on growth retarding in potted chrysanthemum (Dendranthema grandiflora)
    (2024-03-01)
    Piphatwatthanakul, P.
    ;
    Boonkamjat, T.
    ;
    Saetiew, K.
    Paclobutrazol application was compared to the control. It showed a positive influence in reducing stem height, canopy width, internode length, node number, and flower size. Besides, methods of application were insignificantly found. As for the second experiment, decreased concentrations to 0, 100, 200, 300, and 400 ppm of paclobutrazol were tested, using the same manner of application as in the first experiment. It appeared that all concentrations of paclobutrazol decreased canopy width, stem length, internode length, and node number when compared with the control treatment, similar to results of the experiment 1. Nevertheless, it occurred in Prakaimat variety that both foliar spraying and soil drenching of paclobutrazol led to increasing chlorophyll content and carotenoid level. Meanwhile, Fiona chrysanthemum responded better to foliar spraying method than of soil drenching.
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    Influence of plant growth regulators on shoot development of Chrysanthemums
    (2024-01-01)
    Boonkamjat, T.
    ;
    Saetiew, K.
    ;
    Teerarak, M.
    Plant nodes were cultured on MS mediums supplemented with multiple concentrations of plant growth regulators. Sunny Snow produced the largest callus of 1.19×1.19 cm and obtained 93.33% of new shoots with 10 . 0 0 shoots per callus, and 0. 84 g callus fresh weight, when grew in MS medium supplemented with 1 mg/l BA + 0.1 mg/l IAA as compared to the control which no callus was produced. After 20 weeks of culturing, the second set showed that the control treatment of Sunny Snow gave the highest stem growth and the best canopy size of 9.00 and 5.60 cm respectively. Chompoo Phan gave the highest scores of chlorophyll content, i.e., chl a 652.14 µg/g FW, chl b 332.47 µg/g FW and carotenoid 165.92 µg/g FW. Besides, MDA appeared to be highest, 17.37 nmol/g FW when cultured on MS medium supplemented with 1 mg/l BA + 0.1 mg/l IAA.