The Effect of Edta-Se With Different Concentrations on Photosynthesis of Fragrant Rice (Oryza Sativa L.)

Lai, R.; Zhang, T T; Gao, Yongbin; Lu, Ren; Liu, Y F; Zheng, A X; Ashraf, Umair; Fan, Peixian; Du, Bo; Luo, Haowen; Tang, Xinke

doi:10.15666/aeer/1702_32933303

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…Current study agreed with the study of Kong et al (2017) which indicated that the photosynthetic rate at grain-filling stage is one of the important factors affecting the yield of aromatic rice. Our result was also consistent with the study of Lai et al (2019) who indicated that exogenous Se applications could increase the rice yield by regulating the photosynthesis.…”

Section: Discussionsupporting

confidence: 93%

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

Luo¹,

He²,

Du³

et al. 2019

Photosynt.

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In order to study the effect of foliar application of sodium selenate on fragrant rice performance at the heading stage, the present study was conducted with two fragrant rice cultivars, 'Meixiangzhan-2' and 'Xiangyaxiangzhan'. At the heading stage, six concentrations of sodium selenate solution (0, 10, 20, 30, 40, and 50 μmol L-1) were sprinkled to plants. Our results showed that foliar application of sodium selenate increased chlorophyll contents in rice leaves and upregulated net photosynthetic rate at the grain-filling stage. The enhancement was observed in grain yield, seed-setting rate, and in 1,000-grain mass. The highest yield and net photosynthetic rate were both recorded at 40 μmol L-1 treatment for both cultivars. Furthermore, foliar application of sodium selenate also improved some grain quality attributes, such as head rice rate and crude protein content. The Se concentration in fragrant rice grain also increased due to sodium selenate application. In conclusion, sodium selenate has potential to be the exogenous plant growth regulator in fragrant rice production to increase yield and quality.

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Section: Discussionsupporting

confidence: 93%

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

Luo¹,

He²,

Du³

et al. 2019

Photosynt.

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“…The investigations of Liu et al (2019) and Kong et al (2017) demonstrated that the seed-setting rate and 1,000-grain weight of rice were largely dependent on the photosynthesis during the grain-filling stage and that the unsuitable environment during this phase would cause the decline of grain yield due to lower seed-setting rate and 1,000-grain weight. An early study has evidenced that the application of Se at heading stage improved grain yield of rice by enhancing the photosynthesis during the grain-filling stage (Lai et al, 2019). Our results agreed with the study of Duan et al (2019), who indicated that application of the appropri-ate amount of Se increased rice yield by delaying leaf senescence and enhancing photosynthesis.…”

Section: Discussionsupporting

confidence: 91%

Selenium applications enhance 2‐acetyl‐1‐pyrroline biosynthesis and yield formation of fragrant rice

Luo

Lai

et al. 2021

Agronomy Journal

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Selenium (Se) is a beneficial element for plants and a necessary element for humans. Previous studies showed Se could increase 2‐acetyl‐1‐pyrroline (2‐AP) content in fragrant rice (Oryza sativa L.), but the underlying molecular mechanism remains largely unexplored. There are several methods for Se application in rice production, and it is not clear which is better. This study investigated the effects of three different Se application methods on 2‐AP biosynthesis, yield formation, and grain Se concentration of fragrant rice through a four‐season field experiment with two fragrant rice cultivars. For soil application, Se was applied as Se mineral powder as basal application to soil (36 g Se ha−1); for foliar application (FA), sodium selenate solution (40 μmol L−1) was applied as a foliar spray at heading stage; and for seed priming, fragrant rice seeds were primed with sodium selenate at 80 mg kg−1 concentration. The treatment without Se was taken as control (CK). The results showed Se applications increased grain 2‐AP content and grain yield by 3.95–22.32% and 1.03–8.05%, respectively. Compared with CK, Se applications regulated transcript levels of genes PRODH, BADH2, DAO, OAT, and P5CS2, which are involved in 2‐AP biosynthesis. Selenium applications also increased the contents of precursors (Δ1‐pyrroline, proline and pyrroline‐5‐carboxylic acid) and enhanced the activities of enzymes (proline dehydrogenase, △1‐pyrroline‐5‐carboxylic acid synthetase, ornithine aminotransferase, diamine oxidase), which are related to 2‐AP. Furthermore, Se applications increased grain Se concentration by 14.12–63.25%. The highest grain yield, grain 2‐AP content, and grain Se concentration were all recorded in the FA treatment.

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“…For example, the research of He [15] revealed that application of Selenite application at rupturing stage significantly increased the grain yield of rice and promoted the activities of peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) in leaves. Lai [16] demonstrated that that exogenous Se applications could increase the rice yield by regulating the photosynthesis. Furthermore, Wang [17] indicated that lower Se treatments could activate antioxidant system and enhance photosynthesis while higher Se treatment damaged photosynthesis apparatus and inhibited photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Foliar application of sodium selenate induces regulation in yield formation, grain quality characters and 2-acetyl-1-pyrroline biosynthesis in fragrant rice

Luo

et al. 2019

BMC Plant Biol

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BackgroundSelenium (Se) is a beneficial element for higher plants and essential for mammals. To study the effect of the foliar application of sodium selenate on fragrant rice performance, a pot experiment was conducted in Guangdong, China. At the initial heading stage, one-time foliar application of sodium selenate with concentrations of 0, 10, 20, 30, 40 and 50 μmol·L− 1 (named CK, Se1, Se2, Se3, Se4 and Se5, respectively) were foliar applied on two fragrant rice varieties, ‘Meixiangzhan-2’ and ‘Xiangyaxiangzhan’.ResultsSelenate application at the initial heading stage not only improved the grain yield of fragrant rice by increasing the seed-setting rate and grain weight, but also promoted the grain quality by increasing crude protein contents and lowering the chalky rice rate. Furthermore, Se applications enhanced the biosynthesis of 2-acetyl-1- pyrroline (2-AP), the main aromatic compound, by increasing the contents of precursors (△1- pyrroline, proline and pyrroline-5-carboxylic acid (P5C)) and the activities of enzymes (proline dehydrogenase (PRODH), △1-pyrroline-5-carboxylic acid synthetase (P5CS), and ornithine aminotransferase (OAT)) in fragrant rice. The results also showed that foliar application of sodium selenate enhanced the antioxidant system of both varieties by promoting the activities of peroxidase (POD), superoxide dismutase (SOD), catalase (CAT) and reducing the contents of malondialdehyde (MDA). Furthermore, the real-time PCR analyses depicted that foliar application of selenate up-regulated the GPX1, GPX4 and CATC transcripts. The higher antioxidative enzymatic activities might strength the stress resistant to ensure the stability of yield in fragrant rice form abiotic stress.ConclusionsFoliar applications of sodium selenate at the initial heading stage increased the grain 2-AP content by enhancing the biosynthesis-related enzymes and precursors. The grain yield and quality of fragrant rice also increased due to selenate application. Furthermore, foliar application of selenate promoted the activities of enzymes such as POD, SOD and CAT and up-regulated the expression of gene GPX4, GPX1 and CATC.

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The Effect of Edta-Se With Different Concentrations on Photosynthesis of Fragrant Rice (Oryza Sativa L.)

Cited by 8 publications

References 22 publications

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

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

Selenium applications enhance 2‐acetyl‐1‐pyrroline biosynthesis and yield formation of fragrant rice

Foliar application of sodium selenate induces regulation in yield formation, grain quality characters and 2-acetyl-1-pyrroline biosynthesis in fragrant rice

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