Year: 2014 | Month: September | Volume 7 | Issue 3
Morpho-physiological Basis of Waterlogging Tolerance in Pigeonpea [Cajanus cajan (L.) Millsp.]
Abstract:
Global climate change predictions suggest new scenarios with large arid areas and extreme climatologic events. Thus, it is essential to understand how plants respond to different abiotic stresses in order to improve crop performance. A pot experiment was carried in a net house in four replicates of normal (no waterlogging) and waterlogging stress. Excess soil moisture stress was imposed at 21 days after sowing by placing the pots of each genotype in water-filled troughs for 7 and 14 days. The data revealed that the genotypes ICPB 2039 and KPBR 80-2-1 were showed significant superiority during 7 and 14 days waterlogging stress and during recovery for survival percentage. However, during 7 days waterlogging stress genotype KPBR 80-2-1 was superior for plant height and chlorophyll content, ICPH 2431 for root length, ICPL 20128 for leaf area, JBP 110-B for relative water content and JKM 7 for total dry matter production. When the waterlogging duration exceeded 14 days the genotypes showed the highest plant height and relative water content by ICPL 87051, root length and total dry matter production by JKM 7, leaf area by ICPH 2431 and chlorophyll content by C 11 under waterlogged conditions.
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