✦ LIBER ✦

Free tryptophan and indole-3-acetic acid levels in the leaves and vascular pathways ofRicinus communisL.

✍ Scribed by J. R. F. Allen; D. A. Baker

Publisher: Springer-Verlag
Year: 1980
Tongue: English
Weight: 505 KB
Volume: 148
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00385444

No coin nor oath required. For personal study only.

✦ Synopsis

Levels of free tryptophan in the leaves, phloem and xylem saps of Ricinus communis L. were determined by colorimetric assay. Values of 0~38 gg ml-1 in root pressure sap and 96.0 pg ml ~ in phloem sap were recorded. Tryptophan levels were highest in mature and senescing leaves. Levels of indoleacetic acid (IAA) in the phloem sap and leaves were determined by gas chromatography-mass spectrometry using a deuterated internal standard. A mean value of 13.0 ng ml-1 was recorded in phloem sap. The distribution in the leaves showed an inverse relationship to that of tryptophan, being highest in young leaves.

📜 SIMILAR VOLUMES

Evidence for indole-3-acetic acid and tr

Evidence for indole-3-acetic acid and tryptophan in the shoot ofSolanum nigrumand the effect of potassium nutrition on their levels

✍ J. L. Wakhloo 📂 Article 📅 1965 🏛 Springer-Verlag 🌐 English ⚖ 942 KB

Synthesis of [13C]-isotopomers of indole

Synthesis of [13C]-isotopomers of indole and tryptophan for use in the analysis of indole-3-acetic acid biosynthesis

✍ Nebojša Ilić; Jerry D. Cohen 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 French ⚖ 132 KB

## Abstract The direct conversion of indole to indole‐3‐acetic acid without tryptophan as an intermediate has previously been shown to occur __in vivo__, as well as __in vitro__, with seedlings of plants. In order to facilitate the purification of the enzymes that carry out the enzymatic synthesis

The relative importance of tryptophan-de

The relative importance of tryptophan-dependent and tryptophan-independent biosynthesis of indole-3-acetic acid in tobacco during vegetative growth

✍ Folke Sitbon; Crister Åstot; Agneta Edlund; Alan Crozier; Göran Sandberg 📂 Article 📅 2000 🏛 Springer-Verlag 🌐 English ⚖ 127 KB

Indolic constituents and indole-3-acetic

Indolic constituents and indole-3-acetic acid biosynthesis in the wild-type and a tryptophan auxotroph mutant ofArabidopsis thaliana

✍ A. Müller; E. W. Weiler 📂 Article 📅 2000 🏛 Springer-Verlag 🌐 English ⚖ 217 KB

A new mass fragmentographic method for t

A new mass fragmentographic method for the simultaneous analysis of tryptophan, tryptamine, indole-3-acetic acid, serotonin, and 5-hydroxyindole-3-acetic acid in the same sample of rat brain

✍ F. Artigas; E. Gelpí 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 776 KB

Estimates of free and bound indole-3-ace

Estimates of free and bound indole-3-acetic acid and zeatin levels in relation to regulation of apical dominance and tiller release in oat shoots

✍ Marcia A. Harrison; Peter B. Kaufman 📂 Article 📅 1983 🏛 Springer 🌐 English ⚖ 407 KB