Work

Effects of gibberellic acid and prohexadione-calcium on growth, chlorophyll fluorescence and quality of okra plant

Year: 2007

Type: article

Abstract: The experiment was conducted to identify the response of three cultivars of okra [Abelmoschus esculentus (L.) Moench] to exogenous hormones [gibberellic acid-(GA3) and prohexadione-Ca] applied as foliar spray. Stem and leaf dry masses and stem length were significantly enhanced by the application of exogenous GA3, but prohexadione-Ca inhibited growth. Control and prohexadione-Ca treated okra plants took more time to bloom than did GA3 treated plants. In the fruits of all the cultivars a decrease in fructose content was observed, while protein content remained almost unchanged after the application of the two growth regulators. The small changes in chlorophyll a fluorescence characteristics observed under prohexadione-Ca suggested a weakening of the photochemical processes near the photosystem 2 reaction centre. The lowering of ratio between maximum time to reach maximum fluorescence, Fm (Tmax) and Area (sum of Fm-Ft for t = 0 to t = Tmax) caused by GA3 was probably due to the increase of Area rather than to changes in Tmax.

Source: Biologia Plantarum

DOI: 10.1007/s10535-007-0126-5

Authors: I. Ilias, G. Ouzounidou, A. Giannakoula, P. Papadopoulou

Institutions: Alexander Technological Educational Institute of Thessaloniki, National Agricultural Research Foundation

Language: English

Topic: Plant Growth Enhancement Techniques

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: bronze

OpenAlex ID: W2009212416