The presence of fungal and bacterial contamination in vitro propagation is a determinant the culture establishment. biocide PPM (Plant Preservative Mixture™) has been utilized to control contamination. According manufacture’s label, it heat-stable, broad-spectrum product, non-selective, that affects directly microorganisms without causing damage plant cells. purpose this study was evaluate infl...

Pear (Pyrus communis L.) is one of the important species fruits that are widely cultivated in Syria. Seed propagation pear an way to obtain seedlings be used as grafting assets, but method seed difficult due effect dormancy factors germination. The research was carried out during 2020 and 2021 study effects stratification for three periods (30–60–90 days) using ascorbic acid at a concentration ...

L-glycine and L-cysteine, exhibit strong inhibition of partial purified PPO of wild pear. The concentration of L-glycine inhibiting PPO activity by 50% (IC ) was 0.8 and 0.5 mM for catechol oxidation and 50 0.75 and 0.5 mM for pyrogallol oxidation at pH 5 and 7, respectively. IC for L-cysteine calculated, 0.6 and 0.35 50 for catechol oxidation and 0.55 and 0.75 mM for pyrogallol oxidation at pH...