Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Luo, Haowen; He, Lili; Du, Bin; Wang, Z.M.; Zheng, A X; Lai, Rifang; Tang, Xiangru

doi:10.32615/ps.2019.114

Cited by 26 publications

(15 citation statements)

References 23 publications

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“…Therefore, compared with rotary, as plow tillage causes less soil fragmentation, it is relatively more highly conducive to soil conservation, which might be the main reason underlying the observed increment in soil organic matter in these experiments (Du et al, 2019a;Du et al, 2019b). Grain quality attributes including, milling, appearance, nutrient content, texture, and aroma greatly affect the market price of fragrant rice, thus directly influencing the economy of fragrant rice production (Luo et al, 2019b). Here, we observed that continuous plow tillage not only improved grain 2-AP content, additionally, it increased grain protein content while decreasing grain amylose content.…”

Section: Discussionmentioning

confidence: 91%

“…Grain quality attributes including, milling, appearance, nutrient content, texture, and aroma greatly affect the market price of fragrant rice, thus directly influencing the economy of fragrant rice production (Luo et al., 2019b). Here, we observed that continuous plow tillage not only improved grain 2‐AP content, additionally, it increased grain protein content while decreasing grain amylose content.…”

Section: Discussionmentioning

confidence: 99%

“…Seeds of aromatic rice cultivar Meixiangzhan‐2 (Lemont × Fengaozhan), a well‐known and widely grown fragrant rice in South China that is used in many research studies on fragrant rice yield formation and aroma regulation (Luo et al., 2019a; Luo et al., 2019b; Bao et al., 2018) , were collected from the College of Agriculture, South China Agricultural University, Guangzhou, China. Before sowing, seeds were soaked in water for 12 h at room temperature and then placed in an incubator at a constant temperature (38 °C) in darkness for 12 h. Then, shade‐dried germinated seeds were sown in PVC trays with soil medium for nursery raising.…”

Section: Methodsmentioning

confidence: 99%

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Benefits of continuous plow tillage to fragrant rice performance

et al. 2020

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Tillage is one of the most important management practices in rice (Oryza sativa L.) production. However, reports comparing fragrant rice performance under plow tillage vs. rotary tillage are scarce. Here we conducted a five-season field experiment with a fragrant rice cultivar, Meixiangzhan-2, to study the effects of continuous plow tillage on fragrant rice yield, quality, and grain concentration of 2-acetyl-1-pyrroline (2-AP), compared with conventional rotary tillage. The results showed that after three cropping seasons of continuous plowing, compared with conventional rotary tillage, plow tillage not only significantly increased grain yield and affected panicle number per area by 2.98-11.43% and 4.45-18.81%, respectively, but also promoted grain 2-AP concentration and protein content by 17.27-31.46% and 3.94-7.10%, respectively. Moreover, plow tillage decreased grain amylose content by 1.83-3.52%. Compared with conventional rotary tillage, continuous plow tillage also significantly increased dry matter weight of fragrant rice at maturity as well as total N, P, and K accumulation in plant tissues. Moreover, the net income of fragrant rice under plow tillage was US$114.05-526.85 higher than rotary tillage per hectare in the last three cropping seasons. In conclusion, continuous plow tillage enhances fragrant rice performance (yield, quality, aroma) relative to rotary tillage. Our results also improve the scientific database on effects of tillage on rice production.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Benefits of continuous plow tillage to fragrant rice performance

et al. 2020

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“…The study of Luo et al. (2019c) also indicated the application of Se fertilizer was able to promote the fragrant rice productivity and grain quality by increasing the chlorophyll concentration and enhancing the net photosynthetic rate.…”

Section: Discussionmentioning

confidence: 98%

Silicon and selenium fertilizer management improved productivity and aroma of fragrant rice

Wang

Jiang

et al. 2020

Crop Science

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Both Si and Se are the nutrient elements which had significant effects on crop growth and development. However, the application of Si and Se fertilizer management in field production of fragrant rice (Oryza sativa L.) was rarely reported. The present study was conducted with the objective to explore the effects of Si and Se fertilizer on fragrant rice performance though a six-season field experiment. The Se rates were set at three levels: 0 g ha −1 (Se0), 36 g ha −1 (Se1), and 72 g ha −1 (Se2). The SiO 2 rates were set at three levels: 0 kg ha −1 (Si0), 22.45 kg ha −1 (Si1), and 45 kg ha −1 (Si2). Compared with Si0Se0 treatment, Si and Se treatments significantly increased SPAD values and net photosynthetic rates of fragrant rice at tillering stage and heading stage. Higher grain yield, effectively panicle number and seed-setting rate were also recorded in Si1Se1, Si1Se2, Si2Se1, and Si2Se2 treatments than Si0Se0 treatment in each cropping season. Moreover, Si and Se fertilizer management significantly increased the grain 2-acetyl-1-pyrroline (2-AP, main component of fragrant rice aroma) concentrations and the Si2Se1 treatment produced the highest or equally highest grain 2-AP concentration in each cropping season.

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“…Furthermore, under machine-transplanted and machine-direct seeded rice system, rice is distributed in rows in the field with the same plant spacing and thus, the ventilation and lighting will be good (Pan et al, 2017;Huang et al, 2018b). Better ventilation and lighting conditions would lead to the better gas exchange as well as higher net photosynthetic rate of rice and increase DM accumulation and enhance yield formation (Luo et al, 2019). Therefore, we deduced that uniform horizontal distribution of fragrant rice in paddy field under MT and MDS treatments enhanced the canopy apparent photosynthesis and led to the improvement in DM accumulation and yield formation.…”

Section: Discussionmentioning

confidence: 99%

Different seedling managements and fertilizer rates at tillering stage influences the yield formation and aroma content in fragrant rice

Liu

Luo

et al. 2021

Chil. j. agric. res.

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In fragrant rice (Oryza sativa L. subsp. japonica Kato) production, seedling management and fertilization both are important parts. However, the effects of different seedling managements and fertilizer rates on grain yield and 2-acetyl-1-pyrroline (2-AP, main and key compound of fragrant rice aroma) content of fragrant rice are still unknown. In present study, four seedling managements (mechanized transplanting (MT), mechanized direct-seeding (MDS), seedling throwing (ST) and seeds broadcasting (BS)) combined with three fertilizer rates (450 (Fer1), 600 (Fer2) and 750 (Fer3) kg ha -1 ) at tillering stage were applied in a 2-yr field experiment. The results showed that the grain yield and 2-AP content differed in different seedling management and fertilizer rate treatments. The highest grain yield and 2-AP content were recorded in MTFer3 treatment which were 4.81-4.86 t ha -1 and 307.68-390.99 μg kg -1 FW, respectively, while the lowest were recorded in BSFer1 treatment which were 3.96-4.09 t ha -1 and 62.92-165.09 μg kg -1 FW, respectively. Furthermore, the lowest expression of gene BADH2 related to 2-AP biosynthesis was recorded in MTFer3 treatment. Under the same fertilizer rate treatment, MT treatment produced the highest grain yield and 2-AP content which ranged between 4.49-4.86 t ha -1 and 222.16-390.99 μg kg -1 FW, respectively. Under the same seedling management treatment, the highest or equally highest grain yield and 2-AP content were recorded in Fer3 treatment.

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Foliar application of selenium (Se) at heading stage induces regulation of photosynthesis, yield formation, and quality characteristics in fragrant rice

Cited by 26 publications

References 23 publications

Benefits of continuous plow tillage to fragrant rice performance

Benefits of continuous plow tillage to fragrant rice performance

Silicon and selenium fertilizer management improved productivity and aroma of fragrant rice

Different seedling managements and fertilizer rates at tillering stage influences the yield formation and aroma content in fragrant rice

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