Variation in floral morphology of agamosporous (Amorphophallus muelleri Blume) of natural and gibberellin flowerings
Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Bogor 16680, Indonesia. Faculty of Agriculture, Tokyo University of Agriculture, Funako, Atsugi, Kanagawa 243-0034, Japan.
DOI: https://doi.org/10.37855/jah.2018.v20i01.03
Key words: Amorphophallus muelleri, apomictic, Araceae, clonal variation, floral morphology, flower diversity, gibberellin, glucomannan, iles-iles, morphological variation, natural flowering, phenotypic plasticity
Abstract: Morphological variation in triploid apomicts Amorphophallus muelleri has been postulated low, here, we present for the first time macroscopic variation in floral morphology from natural and gibberellin treatments. Agamosporous A. muelleri exhibited morphological variations on 35 out of 45 floral characters. Organ variation was apparent on peduncle, spathe, stigma, carpel, and appendix; that could relate to different genetic background. It seems that gibberellin application at initial stage of flowering incresed the existing morphological variation; causing phenotypic plasticity in three characters, i.e., sheath length, disposition of second spathe and degree of limb apex shape. Present study implies that floral characters can be used as key to determine true-to-type of A. muelleri. Further study is needed to clarify the variation on apomict A. muelleri using approaches such as metabolomics and hormonal dynamic during flowering.
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