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Author: search.filters.author.Anuwong, ChamaipornSubject: search.filters.subject.GA3

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    Methods of Breaking Seed Dormancy for Four Species of Ornamental Cacti
    (2025-01-02)
    Ritthidechrat, Kittiphan
    ;
    Anuwong, Chamaiporn
    The aim of this study was to investigate methods for breaking the seed dormancy of cacti that are cultivated in Thailand. To stimulate seed germination and decrease the production time for cacti, the research used four cacti species: Astrophytum asterias, Echinocactus grusonii, Myrtillocactus geometrizans, and Turbinicarpus alonsoi, which are extensively grown as ornamental cacti species in Thailand. The experimental design used in this study was a completely randomized design (CRD). The pot experiment consisted of 4 dormancy breaking methods and six replicates, 30 seeds per pot. For the control, seeds were sown onto planting media directly. In the experimental samples, seeds were subjected to different pre-soaking treatments: soaking for 24 h in room temperature water (28±2<sup>o</sup>C), GA<inf>3</inf> 500 ppm for 24 h, and H<inf>2</inf>SO<inf>4</inf> (50%) for 30 min. The seed germination and plant growth data were collected after sowing cacti seeds for two months. The results showed that soaking cacti seeds in room temperature water produced the highest germination rates for A. asterias, E. grusonii, and M. geometrizans. In addition, this treatment also reduced the production time of M. geometrizans. Concurrently, A. asterias, E. grusonii, and M. geometrizans presented higher stem diameters and root lengths of the seedlings, as well as the best result on the seedling vigor of cacti. Soaking seeds with GA<inf>3</inf> resulted in the highest germination percentage of T. alonsoi and accelerated seed germination of A. Asterias, and T. alonsoi. Moreover, this treatment led to the maximum root lengths and seedling vigor of T. alonsoi. However, soaking seeds with H2SO4 was a treatment that gave E. grusonii the maximum root length and seedling vigor.
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    Increased Growth of Caladium Plant Growth Regulators by Tuber Section and Plant Growth Regulators
    (2023-04-01)
    Kosinwattana, Suriya
    ;
    Anuwong, Chamaiporn
    Caladium is a tuberous plant propagated by the tuber section technique to increase the plant quantity. Gibberellin (GA3) and indole-3-butyric acid (IBA) have great capability in various agricultural practices, such as growing rapidly and enlargement tuber size. The effects of different tuber section sizes and PGRs levels having the following constituents (GA3 and IBA) in different levels by 2x5 factorial in a completely randomized design (CRD) with ten replications. The treatments involved 2 factors: The first factor was separating two sizes of tuber section into a squall length of each size 0.5 and 1 cm, and the second factor was drenching the tuber in two different levels of each IBA (100 and 150 ppm) and GA3 (100 and 150 ppm). The results obtained from this experiment showed that the 1 cm of tuber section size was a higher significant difference in bud germination, tuber size, plant height, canopy width, and the number of leaves than the 0.5 cm of tuber section size. However, IBA at 150 ppm was a higher significant difference in the average survival rate, bud germination, plant height, canopy width, and the number of leaves than others. The interaction between the tuber size at 1 cm and IBA at 150 ppm gave the highest survival rate, bud germination, plant height, canopy width, and the number of leaves. Therefore, the Caladium was separated at 1 cm size and immersed in 150 ppm of IBA appropriated to induce growth after the section within two months.