Effects of NAA and Ecklonia maxima Extracts on Lettuce and Tomato Transplant Production

Ecklonia maxima and the commercial biostimulants produced from it contain various plant growth regulators that are responsible for stimulation recorded in many crops. Auxins one of major contained E. extracts. The aim this research was to evaluate growth-promoting effect a seaweed extract on lettuce tomato transplant production under nursery conditions, compare with an equal concentration synthetic auxin. Two doses natural or exogenous auxins (50 100 μg L−1) were supplied substrate through irrigation water ebb flow system, 4, 11, 18 days after sowing. A biostimulant based used as source auxin, while 1-naphthaleneacetic acid (NAA) Seedlings only control. Tomato seedlings treated L−1 tallest plants (+22%), higher leaf number (+12%), wider area (+44%), stronger stem whereas seedling promoted by all treatments, but greater increasing auxin supplementation when using extract, compared NAA. results showed (NAA), containing auxins, can have seedlings. This more evident than tomato. extracts improved quality shoot root NAA auxins.