Activation of growth and nodulation in a symbiotic system between pea plants and leguminous bacteria by near-UV radiation
✍ Scribed by Noriko Shiozaki; Ikuko Hattori; Riho Gojo; Takafumi Tezuka
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 518 KB
- Volume
- 50
- Category
- Article
- ISSN
- 1011-1344
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✦ Synopsis
The effects of near-W (300-400 nm) radiation on shoot length, fresh weight, photosynthesis, respiration, nodulation (nodule formation), Nz-fixation (nitrogenase activity) and flavonoid level have been examined in the symbiotic combination between pea plants (Pisum sativum L. cv. Sparkle) and leguminous bacteria (Rhizobium leguminosarum bv. Viciae strain 128~53). The growth (shoot length and fresh weight) of pea plants is enhanced by near-UV radiation. The net photosynthesis and dark respiration are also significantly promoted. The nodulation and symbiotic N,-fixation are enhanced about two and eight times, respectively, by near-UV radiation. The content of flavonoids in pea roots, which may promote nodulation, is increased 46% by near-UV radiation. A possible mechanism for the action of near-UV radiation on the symbiotic system between leguminous plants and leguminous bacteria is discussed.