Endogenous hormone causes flower and fruit drop of wax apple (Syzygium samarangense cv. Citra)

Etik Wukir Tini,T.A Dwi Haryanto,Saparso Saparso,Sakhidin Sakhidin

doi:10.36253/ahsc-9663

Etik Wukir Tini, T.A Dwi Haryanto + Show 2 more

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https://doi.org/10.36253/ahsc-9663

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Abstract

The aim of this study was to obtain information about the content of endogenous hormones that causes ﬂowers and fruit drop of wax apple. The variables observed in the six stages of ﬂower and fruit development that drop easily and retention of indole-3-acetic acid (IAA), cytokinin (zeatin and kinetin), gibberellins (GA3), 1-amino cyclopropane-1-carboxylic acid (ACC), total sugar, and starch. Six stages of development of wax apple fruit: (1) Bud Development (initial ﬂowering) 0-3 days before anthesis. (2) Anthesis (perfect blooming ﬂowers), 0-7 days after anthesis. (3) Fruit set, 7-14 days after anthesis. (4) Fruit development, 14-28 days after anthesis. (5) Fruit Maturation, 28-35 days after anthesis. (6) Fruit ripening, 35-50 days after anthesis. The results showed that the content of IAA, zeatin, GA3, and total sugar of ﬂowers and fruit of wax apple at 6 stages that would fall smaller than those of retention and ACC content and starch was higher in ﬂower and fruits that drop easily than retention. The kinetin content in the ﬂower development that drop easily is smaller than the retention but in the fruit development the kinetin content is not signiﬁcantly diﬀerent between those that drop easily and retention.

Highlights

Water apple originates from the Southeast Asian region (Indonesia and Malaysia), spreads to the islands of the Pacific and North and Central America
The results showed that the content of indole3acetic acid (IAA), zeatin, GA, and total sugar of flowers and fruit of wax apple at 6 stages that would fall smaller than those of retention and ACC con tent and starch was higher in flower and fruits that drop than retention
Wax apple fruit is consumed as fresh fruit, but it can be made for salad and preparations such as pickles, syrups, jel lies, and cocktails

Summary

Introduction

Water apple originates from the Southeast Asian region (Indonesia and Malaysia), spreads to the islands of the Pacific and North and Central America. Corona Virus Disease (COVID19) is originating from Wuhan, China began to spread throughout the world from January 2020 to 31 December 2020, so there were 83,264,353 cases, with 1,816,164 deaths from 218 affected countries (World Health Organization, 2020). According to the Ministry of Health of the Republic of Indonesia (2020), prevention of viruses can be done by fre quently washing hands, wearing masks, consuming vegetables and fruit, exercise, and adequate rest. One of the prevention efforts that can be done by consuming fruits that contain Vitamin C to enhance immunity. Every 100 g of wax apple fruit contains 22.3 μg of vitamin C (AsiaPacific Association of Agricultural Research Institutions, 2014). Wax apple is a tropical fruit that is cheap, obtained, and contains vitamin C which can be used as an alternative to increasing body immunity as a preventative measure against the COVID19 virus

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