Rice is more sensitive to salinity than previously thought

By S. Grattan, L. Zeng, M. Shannon, S. Roberts. 2002

250 citations recorded by the source corpus.

Field studies conducted by UC and under controlled greenhouse conditions by the U.S. Department of Agriculture's Agricultural Research Service indicate that rice is more sensitive to salinity than current guidelines suggest. This information is particularly important to rice growers who have experienced salinity problems after holding water on fields for longer time periods to reduce pesticide loading into the Sacramento River. Our field experiments show that an average seasonal salinity of the field water in excess of 1.9 deciSiemens per meter (dS/m) can reduce grain yields; current guidelines indicate that salinity affects rice yield at or above 3.0 dS/m. Salinity had a negative impact on a number of yield components including stand establishment; panicles, tillers and spikelets per plant; floret sterility; individual grain size; and even delayed heading. The emergence and early seedling growth stages were most sensitive to salinity, as was the three-leaf to panicle-initiation stages. Irrigation management practices should be adopted to minimize salinity during these critical growth stages.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/abb9c05d5198cebb452059f7a0645ea03741b080

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Citations in the corpus

Iso-osmotic effect of NaCl and PEG on growth, cations and free proline accumulation in callus tissue of two indica rice (Oryza sativa L.) genotypes (2007, background): “Furthermore, it provides means of careful growth measurement of actively growing callus cells in response to abiotic stresses ( Stephen et al. 2002; Shibli and Al-Juboory 2002).”
Salt-tolerant and plant growth-promoting bacteria isolated from Zn/Cd contaminated soil: identification and effect on rice under saline conditions (2014, background): “An average seasonal salinity of field water in excess of 1.9 dS/m can also reduce grain yields, and salinity affects rice yield at or above 3.0 dS/m (Grattan et al. 2002).”
The Economics of Climate Change in Southeast Asia: A Regional Review (2009, background): “Grattan et al. (2002), Maas and Hoffman (1977), Maas and Grattan (1999), and Hanson et al. (1999) reported evidence of the negative effect of increasing soil salinity on rice.”
Recent Updates on Salinity Stress in Rice: From Physiological to Molecular Responses (2011, background): “Under less severe conditions (NaCl 50 mM) salt stress induces delayed panicle initiation and flowering (Grattan et al., 2002) and also leads to poor seed set through reduced pollen viability.”
Performance of four irrigated rice varieties under different levels of salinity stress. (2009, background): “The general effects of salinity are the results of both osmotic and ionic stresses (Greenway and Munns, 1980).”
Simulation of salt and water movement and estimation of water productivity of rice crop irrigated with saline water (2010, background): “Grattan et al. (2002) showed that an average seasonal salinity of the field water in excess of 1.9 dS m -1 can reduce rice grain yields, which was quit lower than the widely accepted guidelines (4.0 dS m -1 ,”