Abstract
Given the high demand for food worldwide, options for maximizing food production with minimum environmental impact are needed. Therefore, the objective of the present study was to evaluate the effect of silicon (Si) and methyl jasmonate (MeJA) in the vegetative development and genetic stability of rice plants, BRSMG Caravera cultivar. The treatments used were T1 - Control group (without Si and MeJA); T2 - Tween foliar; and T3 - Si drench, T4 - MeJA foliar, and T5 - Si drench + MeJA foliar. The use of Si or Si + MeJA promoted an increase in the height, relative chlorophyll index (RCI), and fresh and dry masses, in addition to a greater Si accumulation in the plants. However, there was no difference in the quantity of DNA or in the coefficient of variation (CV) among the treatments, proving the use of silicon separately or in combination with methyl jasmonate contributed to the vegetative development and did not affect the genetic stability of the plants.
Highlights
Rice (Oryza sativa L.) is one of the most produced and consumed cereal grains worldwide and is characterized as a main staple for over half of the world’s population
All plants subjected to treatments with silicon (Si) both separately or in combination with the methyl jasmonate (MeJA) presented an increase of 15.5% in their height in relation to the other treatments and an increase of 15.6% in the relative chlorophyll index (RCI) compared with the control and tween groups
The use of silicic acid both separately or in combination with MeJA provided a greater accumulation of this mineral in the leaves (Figure 1)
Summary
Rice (Oryza sativa L.) is one of the most produced and consumed cereal grains worldwide and is characterized as a main staple for over half of the world’s population. The area under rice production exceeds 157.7 million hectares and yields 469.5 million tons. The main rice producing countries are China, India, and Indonesia (Aoki, Akai, & Ujiie, 2017). Brazil is eighth in the world ranking; it is the first rice producing country outside of the Asian continent. Proper management of fertilization is essential for increasing production and meeting the demand for this grain. Research on silicon sources and doses have been conducted to explore the potential of this element in the improvement of qualitative and quantitative attributes of rice crops (Chagas, Muraoka, Korndörfer, & Camargo, 2016)
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