Root and shoot of local upland rice varieties response to various inorganic phosphorus levels
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Abstract
The influence of four inorganic phosphorus (Pi) concentrations (2.5, 5, 7.5, and 10 ppm Pi) of solid culture medium in five local upland rice (Oryza sativa L.) varieties: Gi Poo, Pae Taw Gor Bi, Aung Jerng Yai, Row Su Ya, and Ni Kor were tested. Pi deficiency caused a significant reduction in some characteristics including adventitious root number (ARN) and shoot dry weight (SDW); but only on eight weeks old seedlings. There were significant differences noted on almost all of the seedling characteristics affected by the rice varieties at seedling age of both four weeks (except SDW) and eight weeks. Trend analysis showed the response on seedling characteristics in these varieties to be varied at eight weeks old seedlings. However, only two varieties: Aung Jerng Yai and Row Su Ya responded to low Pi concentration by increased root architectures. Therefore, these two rice varieties could have the ability to adapt in low P nutrient growing condition
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