Effect of Light Quality on Growth and Free Indoleacetic Acid Content in <i>Phaseolus vulgaris</i>

Abstract

Early work on the effects of light quality on plant elongation produced many conflicting reports. Vince et al. ( Conflict still exists, how-ever, in spite of im- provedl techniques. Vince and Stoughton ( In a study conducte(d with a number of species he found(l that at lowr intensities red lighlt is more inhiihitorv to eloingation than is blue. His ob- servations have been confirnme(d by Fortanier (5), who pointe(l out further that results obtained with low intensities are opposite to those obtaine(d with high intensities.