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This study aimed to observe the viability of the pollen grains of Malpighia emarginata DC. (West Indian cherry) and the action of a lectin in their germination. Lectins are proteins that specifically interact with carbohydrates, but don’t modify them and bind with high affinity and specificity, promoting a transfer of information that is clearly central to many cellular processes in living beings. For the viability test was used aniline blue in lactophenol. The in vitro germination test used was the hanging drop method, in control medium containing sucrose, boric acid, calcium nitrate and agar. The experiment dealt with three different treatments in order to pollen germination: growing medium without addition of lectin, with 1.0 μg/ml and with 3.0 μg/ml CPL lectin. This lectin is extracted from seeds of Crotalaria pallida L.-Leguminosae. Data on pollen grains were analyzed by one-way ANOVA, with 95% reliability and comparison of averages by Turkey test at 5% probability. It was found that despite previous high viability of the pollen grains (c. 70%), a germinability rate has been low, yet exceptionally larger in pollen samples placed on a growing medium with addition of 3.0 μg/ml of CPL lectin (24%). There was no significant difference among the pollen grains germinate in medium without lectin and those in medium with the addition of only 1.0 μg/ml. According to data obtained in the treatments, CPL lectin, with concentration of 3.0 μg/ml, influenced the formation of the pollen tube and thus more pollen germinated in Malpighia emarginata.<o:p></o:p> </p

american journal of plant sciences

Viability and Action of CPL Lectin on &amp;lt;i&amp;gt;in Vitro&amp;lt;/i&amp;gt; Germinability of Pollen Grains of &amp;lt;i&amp;gt;Malpighia emarginata&amp;lt;/i&amp;gt; DC.—(Malpighiaceae)