Ethylene production and involvement during the first steps of durum wheat (Triticum durum) anther culture

被引:0
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作者
Sevenier, R
Coumans, M
机构
关键词
ACC; anther culture; AOA; 2-chloroethylphosphonic acid; durum wheat; ethylene; MACC; microspore; Triticum durum;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The role of ethylene in anther culture of durum wheat (Triticum durum Desf. cv. Ardente) was analyzed by testing the effects of 2-chloroethylphosphonic acid (ethrel), silver thiosulfate (Ag+), alpha-aminooxyacetic acid (AOA) and 1-aminocyclopropane-1-carboxylic acid (ACC) on microspore division observed after 21 days of culture and on development of calli estimated at day 45. The use of ethrel and Ag+ indicated a positive effect of ethylene on microspore division, whereas the use of AOA, and to a lesser extent ACC, showed a negative effect. In contrast, the addition of ethrel or Ag+ indicated that ethylene inhibits the development of microspore-derived calli. AOA gave contradictory results. Ethylene production by anthers was about 7 pi anther(-1) h(-1) and decreased during culture, ACC content in the anthers was maximal at day 9, whereas malonyl ACC (MACC) increased sharply from day 0 to day 3 and then decreased. The addition of AOA or ACC to the culture medium decreased or increased, respectively, ethylene production of anthers and the ACC and/or MACC content, but at concentrations higher than those that modified the formation of calli. This formation seems to occur in two successive phases: induction and initiation of microspore division, which was promoted by ethylene, followed by callus development, which was inhibited by ethylene.
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页码:146 / 151
页数:6
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