Ionome variation in bean plant growth under different Se forms and application rates

作者：Hermosillo Cereceres Martha A; Sanchez Chavez Esteban^*; Balandran Quintana Rene R; Mendoza Wilson Ana M; Guevara Aguilar Alexandro; Munoz Marquez Ezequiel; Garcia Banuelos Monica L

来源：Journal of Food Agriculture and Environment, 2011, 9(3-4): 374-378.

• Ionome
• variation
• selenium
• Phaseolus vulgaris L.
• biofortification
• application
• rates
• selenite
• selenate

The study of the ionome in crops enables us to determine plant's nutritional quality and the possible causes of its variations. Therefore, in this study, 6 rates of sodium selenite and sodium selenate (0, 10, 20, 40, 80 and 160 mu M) were applied for 40 days to bean plants in order to ascertain how selenium biofortification influenced the ionome of the crop. The biofortification of agricultural crops with micronutrients is the process of increasing the bioavailable concentrations of essential elements in the edible parts of cropped plants. The total biomass of the plant, the selenium concentration of the seed, the fruit yield, and the micro/macronutrient concentrations were determined in the leaf. The results indicated that selenate was less toxic than selenite, as high rates of this element drastically diminished plant biomass. In general, the essential nutrients proved antagonistic towards selenium in its forms and rates applied to the bean crop given that the two forms of selenium lowered the concentration of these nutrients in the leaf. Nevertheless, none of these nutrients fell below the sufficiency range for this crop. Selenium favored only higher calcium concentrations without reaching toxic values for the plant, and therefore we can state that fertilization with selenium improves bean yield. Finally, it is important to note that the increase of the selenium content in bean under biofortification programs constitutes a promising strategy in cropping systems that could increase the ingestion of this nutrient in the general population, fostering benefits that this element offers in human health.

• 出版日期2011-10