Gonzales-Centeno, Nalia J.

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    Citoquinina y Giberelinas incrementan el crecimiento de plantas jóvenes de Achachairú (Garcinia gardneriana)
    (2014) Gonzales-Centeno, Nalia J.; Ferwerda, Feiko H.; College of Agricultural Sciences; Chávez Jáuregui, Rosa N.; Wessel-Beaver, Linda; Department of Crops and Agro-Environmental Sciences; Kolterman, Duane A.
    Achachairú (Garcinia gardneriana) is an exotic fruit tree of South American origin that is characterized by having a slow vegetative development. from seed, there is an average delay of 7 to 8 years before fruit production. The use of growth regulators might be a means of accelerating the growth of young plants. In this study, the effects of 6-benziladenine (BA) and the gibberellins GA3 and GA4+7 were evaluated. The growth regulators (GR) were applied alone or in combination at low and high doses in three-month old achachairú seedlings. Applications of GR were continued every two weeks for 5 months. The use of gibberellins alone was more effective than BA alone. Plants treated only with gibberellins initiated their first flush in less time, had a great number of flushes, had more and longer internodes, were taller, and had thicker stems. There were few differences between plants treated with GA3 or GA4+7. The low dose of GA4+7 and the high dose of GA3 + GA4+7 + BA were more effective than other treatments, beginning as early as 28 days after the first application. Plants with these treatments had a greater number of leaves per flush, total number of leaves, number of branches, plant height, internode length and branch length, and a shorter time to branching. In a second experiment seeds of achachairú, with and without the testa removed, were treated with 0, 250 or 500 m/L of GA3. Plant height, stem diameter, internode length and number of leaves were greater in plants from seeds with the testa removed. Plant height and internode length was greater in plants from seeds treated with the high dose of GA3. In general, the application of gibberellins, either to seeds or to seedlings, shows promise as a technique for accelerating early growth in achachairú.