Abstract

ALVAREZ BELLO, Idioleidys  and  REYNALDO ESCOBAR, Inés M. Pectimorf^® effect on bean (Phaseolus vulgaris L.) stomatal index. cultrop [online]. 2015, vol.36, n.3, pp. 82-87. ISSN 1819-4087.

Plant development and growth is potentiate by Pectimorf under drought conditions, but it action mechanism is unknown. Due to, to determine the effect of Pectimorf^® on stomatal distribution in bean (Phaseolus vulgaris L.) leaf surface was the aim of this research. C 25-9 Cuban cultivar was employed and sprayed with Pectimorf^® to rate of 10 mg L^-1.To anatomical study, foliar epidermis was observed to optical microscope (Motic) light and photographed with a camera attached. Stomata variables were measured by morphometric ImageJ program and processed with the statistical package Stargrafic 5.0. Stomata index increase was observed in Pectimorf^® treated plant and this result could be to favour plant water status. The structure of epidermal cells remained unchanged on both leaf surfaces, however, some changes in size of stomatal cells were observed in presence of Pectimorf^®. More narrow and short occlusive cells on abaxial surface were exhibited on treated plants, so leaves with the most stomatal index were characterized by smallest stomata. The results obtained allowed to know that Pectimorf^® causes changes in the distribution patterns and stomatal morphogenesis, which could be to favors successfully growing of bean plant in unfavorable environments

Keywords : stomatal index; oligogalacturonides; bean; Phaseolus.

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