What is the auxin concentration need to maintain the inhibition of the lateral shoot and how the auxin will help in that process. at the same time auxin is produced more at shoot apex and young leaves , but how it will help in root initation.
Hi,
Concentration is going to depend on the species. Hormones can have an effect at very low concentration. To understand the mechanisms of auxins, I recommend you to read a review. There are good reviews of the auxins mechanisms.
Dear Moola, I would suggest to try different concentration of auxins to determine the best level, since the optimal concentration is species- and growth sage-dependent.
Good luck.
Auxin are produced at apical region but are translocated to site of action.
Respected Srinath Sir
Thank you for answer and spent time for it , even auxin are produced at apical region but i have keen interest to know about the mechanism involved in translocation. please gave some suggestions.
Thanking you
Yours Sincerely
this phenomenon is known as correlative bud inhibition, or apical dominance. it is physiological basis,suggest that I AA, produced by the shoot apical meristem influence the distribution of root produced cytokinins,causing less cytokinins, to reach the axillary buds, which remains cor relatively inhibited. the evidence to support this, is that exogenous application of cytokinins,releases axillary buds from inhibition , as for the concentration of auxins needed to cause bud inhibition it depends on plant species, as there some plants show strong degree of apical dominance,while others show weak apical dominance. the auxins moving basipetally causes root initiation.
I used a concentration of 25 mM IAA in lanolin to inhibit lateral shoot outgrowth in Arabidopsis.
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