Effect of jasmonic acid on in vitro explant growth and microtuberization in potato
2006
Zhang, Z.J.(North Univ. of China, Taiyuan (China). Dept. of Environment and Safety Engineering) | Zhou, W.J.(Zhejiang Univ., Hangzhou (China). Coll. of Agriculture and Biotechnology) E-mail:[email protected] | Li, H.Z.(North Univ. of China, Taiyuan (China). Dept. of Environment and Safety Engineering) | Zhang, G.Q.(Zhejiang Univ., Hangzhou (China). Coll. of Agriculture and Biotechnology) | Subrahmaniyan, K.(Zhejiang Univ., Hangzhou (China). Coll. of Agriculture and Biotechnology) | Yu, J.Q.(Zhejiang Univ., Hangzhou (China). Coll. of Agriculture and Biotechnology)
The effect of different concentrations of jasmonic acid (JA) on the growth and development of potato plantlets and microtubers was investigated in two cultivars, Favorita and Helanwuhua, under in vitro conditions. Shoot fresh mass, root length and root numbers increased significantly after application of 0.2-2 mg/dm3 JA in the Murashige and Skoog medium. However, the growth of potato explants was inhibited by JA at high concentrations (20-50 mg/dm3). Chlorophyll content in explant leaves decreased with increasing JA concentration. The activity of acid peroxidase increased in leaves treated with 0.2 mg/dm3 JA, whereas it decreased in leaves treated with more than 2 mg/dm3 JA. Under the darkness, the microtuber numbers, fresh mass and percentage of big microtubers of the two cultivars were not enhanced by the application of 0.2-50 mg/dm3 JA.
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