It has been previously demonstrated (15) that the growth of the strawberry receptacle is regulated by the achenes. This control is exerted through substances which are active in the Avena test, a standard test for auxins. The exact identity of these natural auxins, however, had not been investigated. The purpose of this paper is to report further experiments on the production of auxins by straw...

The soluble bean leaf auxin-binding protein (ABP) has a high affinity for a range of auxins including indole-3-acetic acid (IAA), alpha-napthaleneacetic acid, phenylacetic acid, 2,4,5-trichlorophenoxyacetic acid, and structurally related auxins. A large number of nonauxin compounds that are nevertheless structurally related to auxins do not displace IAA from bean ABP. Bean ABP has a high affini...

Beside indoleacetic acid (IAA), 3 auxins were found by chromatographic resolution of acidic fractions of Avena and Zea coleoptile tips. One of these auxins, designated P, occurred at levels of activity approaching those of IAA. The other 2 auxins, termed F and M, occurred at lower levels of activity. When the auxins of the excised coleoptile tips were isolated immediately after equilateral or u...

The Present study summarizes the biosynthesis, characterization and optimization of auxins by Piriformospora indica and its effect on the growth of Solanum melongena L. cultivars. The biosynthesis of auxins was greatly influenced by the addition of tryptophan. Based on the data obtained from traditional one factor at a time method, optimization was carried out using the response surface methodo...

In recent years, Hertel et al. 1 have studied the primary binding sites of auxins. They pointed out that the binding site in vitro should be specific “i. e., only growth-active transportable auxins, and competitive autiauxins or transport inhibitors but not inactive analogues should interact with the re­ ceptor.” They further suggested that “auxin inter­ acts with the plasma membrane at least d...

Natural Auxins, consists of seven papers. Their consensus is that, while indole-3-acetic acid is still to be considered a naturally occurring auxin of great importance, it is only one; a number of other indole-containing compounds, as well as less clearly identified substances, may also act as auxins in normal growth. These papers also bear witness to the immense value of partition paper chroma...

Auxin is one type of phytohormones that plays important roles in nearly all aspects of plant growth and developmental processes. The glycosylation of auxins is considered to be an essential mechanism to control the level of active auxins. Thus, the identification of auxin glycosyltransferases is of great significance for further understanding the auxin regulation. In this study, we biochemicall...