Premium
Inhibition of Cowpea Seedling Growth by Methionine Analogs 1
Author(s) -
Dessauer Dan W.,
Hannah L. Curtis
Publication year - 1978
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1978.0011183x001800040018x
Subject(s) - ethionine , methionine , seedling , vigna , biology , norleucine , nutrient , biochemistry , food science , botany , amino acid , ecology
The effects of reported methionine analogs on seedling growth of cowpea ( Vigna unguiculata L.) were studied. L‐methionine‐DL‐sulfoximine (MS) was the most toxic, followed in order by ethionine, a‐methyl methionine (MM), and norleucine. Application of methionine protected seedlings from the inhibitory effects of ethionine and MM. Simultaneous addition of lysine and threonine in nutrient solution did not inhibit seedling growth, while methionine at 300 ppm was partially inhibitory. Screening of 33,000 M 2 seedlings from ethylmethane sulfonate‐treated seeds resulted in the recovery of one plant resistant to ethionine and one resistant to MM. The latter was not viable. Seeds produced from plants grown in nutrient solution plus 200 ppm methionine contained approximately 10% more protein, total methionine, and free methionine in comparison to seeds produced in the absence of exogenous methione.