Auxin is Coleoptile Bending Toward the Light

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Theword of auxin  was first used by Frits Went. the found that a compound causes bending coleoptile toward light. The bending of the coleoptile caused by cell elongation in terpacunya side attached pieces of agar containing auxin. Went auxin found now known as acid indole acetic (IAA). Besides IAA, plants contain three other compounds are considered as hormone auxin, which is 4-chloro indolasetat (4 chloro IAA) found in young seeds nuts, phenyl acetic acid (PAA) were encountered in many plant species,  and indolbutirat acid (IBA) which found in the leaves of corn and a variety of plant species
dicots.

Auxin plays a role in a variety of activities plants include:

Development of fruit

At the time of developing mature seeds , seeds issued auxin to the sections of interest that stimulates the formation of fruit. Thus, administration of auxin on flower are not pollinated will stimulate the development of the fruit seedless. It is called partenokarpi.

Apical dominance

Apical dominance is a shoot tip growth plants that inhibit the development of lateral buds in lower stem. Apical dominance is the result of downward auxin transport made ​​in the apical meristem.

Abscission

Young leaves and young fruits form of auxin, so that remained strong both attached to the stem. However, when reduced auxin formation, a layer of specialized cells formed in the base of the leaf stalk and the fruit so that the leaves and fruit fall.

The formation of adventitious roots

Auxin stimulates root formation that grows wild of stems or leaves of many species. Advertisement