The effect of Ortho and Para-Hydroxy cinnamic acid and caffeic acid on adventitious root formation of mung bean cuttings in presence or absence of boron

الملخص EN

The effect of O- and P- Hydroxy cinnamic acid and Caffeic acid on rooting response of mung bean cuttings with respect to auxin (IAA) & boron has been studied.

The effective concentration is 10-3M for all of the above tested compounds, whether cuttings were taken from 10-day-old light grown seedlings in deionized H2O or in boric acid (5μg \ ml).

The results were revealed that at this conc.

the above compounds induce adventitious rooting by 267.7 %, 219.1 %, 202.9 % over control respectively, in cuttings taken from seedlings grown in Deionized \ H2O ; whereas, the percentage of induction was declined to 188.3 %, 174.6 %, 180.6 % respectively in cuttings taken from seedlings grown in boric acid (5μg \ ml).

However, caffeic acid was significantly increase adventitious root formation in simultaneous application with IAA over control in presence or absence of boric acid compared to o- coumaric acid & pcoumaric acid, but the rooting response was declined in cuttings were taken from seedlings grown in boric acid compared to d \ d H2O (533.9 % & 498 %) respectively.

The role of boron in combination with the above phenolic compounds individually was suggested to affects the decarboxylation of IAA that catalyzed by IAA-Oxidase.