Tyrosine synthesis in potato tuber tissue from blackspot-susceptible and resistant genotypes |
| |
Authors: | Bill B. Dean Narcyz Jackowiack Sharon Munck |
| |
Affiliation: | (1) Irrigated Agriculture Research and Extension Center, Washington State University-Porsser, 99350-9687 Prosser, WA, USA |
| |
Abstract: | Summary Radioactively-labeled shikimic acid (14C) was incubated with potato tuber tissue disks to determine the relative rate of tyrosine synthesis in blackspot-resistant and susceptible cultivars. Tyrosine synthesis was 55% higher in the susceptible cultivar, Lemhi Russet, than the resistant clone TXA 763-5. The susceptible clone also partitioned a lower percentage of14C tyrosine into soluble protein than did the resistant genotype. The percentage of labeled free tyrosine which would be available for oxidation by polyphenyloxidase was therefore much higher in the susceptible cultivar. Hort/LA Paper No. 90-27. Project No. 0766. Washington State University, College of Agriculture and Home Economics Research Center, Pullman, WA 99164 |
| |
Keywords: | Solanum tuberosum bruise melanin shikimic acid phenylalamine |
本文献已被 SpringerLink 等数据库收录! |
|