Phenolic Biosynthesis Inhibitors Accentuate the Effects of Heat-Shock Injury in Mung Bean Seedlings
| Autor: | Ranjit K. Basra, Amarjit S. Basra |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Journal of New Seeds. 3:41-49 |
| ISSN: | 1522-9025 1522-886X |
| DOI: | 10.1300/j153v03n04_04 |
| Popis: | Germinating seeds of Vigna radiata (Linn) Wilczek cv. ML 311, with a radicle length of 5 mm, were subjected to a brief heat-shock episode of 50°C for 2 h followed by transfer to the normal temperature (28°C) for three days in the dark. Exogenous effects of salicylic acid and two inhibitors of phenylalanine ammonia lyase (PAL), i.e., AOPP (L-a-aminooxy-β-phenyl propionic acid) and AIP [2-(aminoindan-2-phosphonic acid)], applied either as a pre-treatment at the normal temperature (28°C, 2 h) or as a co-treatment during the heat-shock period itself (50°C, 2 h), were studied alone and in combination, with a view to modulate the heat-shock response of etiolated seedlings. Growth analysis revealed that treatment with AOPP and AIP rendered the seedlings more vulnerable to heat shock, whereas co-application of salicylic acid either alone or in combination with PAL inhibitors appreciably enhanced the thermotolerance ability of both roots and hypocotyls in intact seedlings. Enhanced thermotolerance was ass... |
| Databáze: | OpenAIRE |
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