Reference "Five genes induced by aluminum in wheat (Triticum aestivum L.) roots"

Reference ID

9164

Title

Five genes induced by aluminum in wheat (Triticum aestivum L.) roots

Source

Plant physiology, 1993, vol. 103, pp. 855-861

Authors (2)

Snowden-K-C

Gardner-R-C

Abstract

Five different cDNAs (termed wali1 to wali5 for Wheat Aluminum Induced) whose
expression was induced by Al stress have been isolated from the root tips of Al-
treated wheat (Triticum aestivum L.) plants. Four of these genes were induced 24
to 96 h after Al treatment, and their expression is reduced when the Al is
removed. Each of these four genes was induced by inhibitory levels of Al in two
wheat cultivars--Warigal, an Al-sensitive cultivar, and Waalt, an Al-tolerant
cultivar. The fifth gene (wali2) showed a complex bimodal pattern of induction
and was induced by Al only in the sensitive cultivar. Comparison of the
nucleotide sequences of these clones to those in the sequence data bases showed
that wali4 is homologous to phenylalanine ammonia-lyase and wali1 is homologous
to a group of plant proteins that are cysteine-rich and have homology to
metallothioneins. wali2 encodes a novel protein with a repeating motif of
cysteine amino acids. The remaining two wali clones (wali3 and wali5) encode
related, cysteine-rich proteins that show no significant homology to any known
sequences.