Shreef MAHMOOD, Mohammad Nazmul HASAN, Sheikh Mohammad Younus ALİ, Rafiza Alam RİPA, Mohammad Golap HOSSAİN

Effect of Plant Growth Regulators on Fruit-set and Quality of Guava

Two plant growth regulators: ?-NOA (50 and 80 ppm) and GA (200 and 250 ppm) were applied to emasculated flowers at anthesis to set parthenocarpic fruit, while in the control treatment fruit set was achieved by natural pollination. The application of ?-NOA found ineffective in setting parthenocarpic guava. No significant differences were observed in the length and diameter of fruit between parthenocarpic and naturally pollinated seeded fruit at different days after anthesis. The mean fruit weight, TSS and ascorbic acid content of parthenocarpic fruit were similar to that of seeded fruit. Significant higher amount of total polyphenol was detected in the seeded fruit than the parthenocarpic fruit. Although 200 ppm GA showed comparatively better response to fruit growth, TSS and ascorbic acid content than 250 ppm GA but not in a statistical level.

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Archbold DD, Dennis FG. 1985. Strawberry receptacle growth and endogenous IAA content as affected by growth regulator application and achene removal. J. Am. Soc. Hortic. Sci., 110: 816-820.

Bajaj KL, Kaur G. 1981. Spectrophotometric determination of L- ascorbic acid in vegetables and fruits. Analyst., 106: 117-120.

Balasubramanyam VR, Rangaswamy G. 1960. Gibberellins induced parthenocarpy in guava (Psidium guajava L.). Curr. Sci., 28: 312.

BBS. 2010. Year Book of Agricultural Statistics of Bangladesh. Bangladesh Bureau of Statistics. Statistics Division. Ministry of Planning. Govt. of the People's Republic of Bangladesh.

Costa G, Bucchi F, Montefiori M, Bregoli AM, Grappadelli LC. 2004. Thinning activity and fruit quality of Gala and Fuji apple varieties as affected by cytokinins. Acta Hortic., 653: 107-113.

Ercan N, Akilli M. 1996. Reasons for parthenocarpy and the effects of various hormone treatments on fruit set in pepino (Solanum muricatum Ait.). Sci. Hortic., 66: 141-147.

Gustafson FG. 1936. Inducement of fruit development by growth- promoting chemicals. Proceedings of the National Academy of Sciences USA. 22: 628-636.

Gutierrez RMP, Mitchell S, Solis RV. 2008. Psidium guajava: A review of its traditional uses, phytochemistry and pharmacology. J. Ethnopharmacol., 117 (1): 1-27.

Islam MM, Siddique MA. 1973. A study on the induction of parthenocarpic guava by gibberellic acid. Bangladesh Hortic., 1(1): 31-36.

Kojima K, Tamura Y, Nakano M, Han DS, Niimi Y. 2003. Distribution of indole-acetic acid, gibberellin and cytokinins in apoplast and symplast of parthenocarpic tomato fruits. Plant Growth Regul., 41: 99-104.

Kumar A. 2012. Importance for life 'Psidium guava'- review article. Int. J. Res. Pharm. Biomed. Sci., 3(1): 137-143.

Olympios CM. 1976. Effect of plant growth regulators on fruit-set and fruit development of the eggplant (Solanum melongena L.). Hortic. Res., 16: 65-70.

Rao SN, Reddy RN, Sreeramulu P. 1962. Studies on the effects of gibberellic acid on fruit set, size, weight, seed content and quality of grapes. Andhra Agric. J., 9: 166-174.

Rotino GL, Acciarri N, Sabatini E, Mennella G, Lo Scalzo R, Maestrelli A, Molesini B, Pandolfini T, Scalzo J, Mezzetti B, Spena A. 2005. Open field trial of genetically modified parthenocarpic tomato: seedlessness and fruit quality. BMC Biotechnol., 5: 32.

Roussos PA, Denaxa NK, Damvakaris T. 2009. Strawberry fruit quality attributes after application of plant growth stimulating compounds. Sci. Hortic., 119: 138-146.

Shanker S. 1967. Physico-chemical studies of five guava varieties of Uttar Pradesh. Allahabad Farmer, 41(1): 9-12.

Singleton VL, Rossi JA. 1965. Colorimetry of total phenolics with phosphomolybdic phosphotungstic acid reagents. Am. J. Enol. Vitic. 16: 144-158.

Stern RA, Flaishman M, Applebaum S, Ben-Arie R. 2008. Auxins increase fruit size of 'Bing' (Prunus avium L.) cherry in a warm climate. Acta Hortic., 774: 243-249.

STSC Inc., 1987. Statgraphics Users' Guide.

Thompson PA. 1969. The effect of applied growth substances on development of the strawberry fruit. II. Interactions of auxins and gibberellins. J. Exp. Bot., 20: 629-647.

Velioglu YS, Mazza G, Gao L, Oomah BD. 1998. Antioxidant activity and total phenolics in selected fruits, vegetables, and grain products. J. Agr. Food Chem., 46: 4113-4117.