Submergence tolerance in relation to variable floodwater conditions in rice

Submergence Tolerant Rice: SUB1’s Journey from Landrace to Modern Cultivar

“…Submergence imposes a complex abiotic stress (Setter et al 1997;Jackson and Ram 2003;Sarkar et al 2006;Bailey-48 kb Sub1A-Sub1B Sub1C Serres and Voesenek 2008), and the extent of injury caused by complete submergence is largely dependent on floodwater conditions, particularly its temperature, turbidity, and the extent of light penetration (Das et al 2009). The 10 4 -fold reduction in diffusion of gases in water relative to air limits the exchange of carbon dioxide and oxygen necessary for photosynthesis and respiration and increases the cellular concentration of the gaseous hormone ethylene.…”

“…These new lines endure submergence, as long as the flood occurs after the seedling stage but before flowering and the flood completely subsides within 10 to 20 days, depending on floodwater conditions (Das et al 2009). Although vegetative growth is restricted in some SUB1 varieties until the water level drops to 10-15 cm, mainly because of short stature, our recent studies showed that this is not the case when SUB1 is transferred into taller varieties or those with better tolerance of partial stagnant flooding (20-50 cm).…”

Transforming rice cultivation in flood prone coastal Odisha to ensure food and economic security

“…However, most of the rice cultivars cannot survive complete submergence for more than a week (Palada and Vergara 1972;Adkins et al 1990). Thus, the extent of damage caused by flooding varies according to the depth and duration of submergence and is further conditional on the topography of the land (Mishra et al 2010), and floodwater conditions (Das et al 2009). The extent of loss during most flood incidences is severe and irreparable as the crops are generally in an active stage of growth with farmers already having made significant investments in terms of inputs.…”

Effect of Nitrogen and Potassium on the Root Growth, Nutrient Content and Yield of Mungbean (<i>Vigna radiata<i/> L. Wilczek) under Waterlogged Condition

“…On the other hand, nutrient supply and The Agriculturists 13(1): 67-78 (2015) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print) A Scientific Journal of Krishi Foundation Indexed Journal availability in the soil plays a significant impact on waterlogging tolerance of plants (Huang, 2000;Romheld and Kirkby, 2010). Waterlogging inhibits root respiration due to insufficient supply of oxygen (Das et al, 2009). Exogenous application of N in flooded bushbean, cowpea and sweet corn (Li et al, 2012) and K in upland cotton (Ashraf et al, 2011) could effectively ameliorate the adverse effects of waterlogging on plants.…”