biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 48:145-148, 2004 | DOI: 10.1023/B:BIOP.0000024293.31266.a2

Improvement of Biomass Partitioning, Flowering and Yield by Triadimefon in UV-B Stressed Vigna radiata (L.) Wilczek

K. Rajendiran1,*, M.P. Ramanujam1
1 Botany Laboratory, Centre for Post Graduate Studies, Pondicherry, India

Elevated UV-B radiation (12.2 kJ m-2 d-1) as against the ambient level of 10 kJ m-2 d-1 affected flowering, productivity and biomass partitioning of green gram [Vigna radiata (L.) Wilczek cv. KM-2]. UV-B stress delayed flowering initiation and achievement of 50 % flowering, reduced flower retention by 25 %, potential yield by 18 % and all yield attributes such as pod number (25 %), pod mass (41 %), seed number (32 %) and seed mass (45 %). Harvest index and shelling percentage were also reduced by 31 and 7 %, respectively. Application of triadimefon (20 mg dm-3) to unstressed plants accelerated flowering and enhanced flower retention (21 %), potential yield (15 %) and yield attributes (7 to 44 %). The partitioning of biomass between plant parts also showed improvement over the control plants. In UV-B-stressed plants, triadimefon treatment compensated the inhibitions to varying extents.

Keywords: alleviation of UV-B stress; elevated UV-B; plant growth regulator; triazole compounds
Subjects: flowering, UV-B, triadimefon; growth analysis, plant development, biomass and yield enhancement; monochromatic radiation; radiation, UV-B elevation, stress alleviation, triadimefon; triadimefon, UV-B

Published: March 1, 2004  Show citation

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Rajendiran, K., & Ramanujam, M.P. (2004). Improvement of Biomass Partitioning, Flowering and Yield by Triadimefon in UV-B Stressed Vigna radiata (L.) Wilczek. Biologia plantarum, 48(1), 145-148. doi: 10.1023/B:BIOP.0000024293.31266.a2
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