Seed vigor, antioxidant metabolism and initial growth characteristics of red rice seedlings under different light intensities

Aumonde, Tiago Zanatta; Pedó, Tiago; Borella, Júnior; Amarante, Luciano do; Villela, Francisco Amaral

doi:10.1590/s0102-33062013000200007

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…Rice productivity comes under some influencing indices which are often interdependent. The present study revealed that total number of tillers; and more importantly, number of effective tillers increased with increasing light intensity; this agreed with the findings of [10], who reported that the numbers of tiller increased in parallel with increases in the level of light intensity. In the same vein, the quantity of harvest is directly related to the number of tillers that produced panicles provided there were no disease or pest incidence.…”

Section: Resultssupporting

confidence: 93%

Growth and production of new superior rice varieties in the shade intensity

Yusuf

Harahap

Akoeb

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Shade intensity is one of the most important requirements for plant growth, affecting growth, development, survival, and crop productivity. This study aims to evaluate the growth and productiom of New Superior Rice Varieties In The shade Intensity. This study was conducted in BalaiPengkajianTeknologiPertanian, Pagar Merbau, Deli Serdang, North Sumatra. The research used completely randomized design with twofactors. The shade intensity (N) were 25%, 50% and no shade intensity as a control. Whereas new superior rice varieties were V 1 : Inpara 2, V 2 : Suluttan Unsrat 2, V 3 : Inpari Mugibat, V 4 : Inpari Sidenuk, V 5 : Mekongga, V 6 : Ciherang, V 7 :Inpari 10, V 8 : Inpari 3, V 9 : Inpari 4, V 10 : Inpari 30, dan V 11 : Cibogo. The result indicated that new superior rice varietiesshowedsignificant effectonthe growth and productionvariablesuch as leaf area, where Inpari Sidenuk variety was the highest among the varieties. Total chorophyll, the highest was found on Inpari variety. Number of tillers and plant height where the highest was found on Ciherang variety. The shade intensity showed significant effect on leaf area, where 25% shade intensity was the highest. Total chlorophyll, the highest was found on 50% shade intensity, number of tillers, the highest was found on no shade intensity.

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Section: Resultssupporting

confidence: 93%

Growth and production of new superior rice varieties in the shade intensity

Yusuf

Harahap

Akoeb

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…Boscolo et al (2003) also reported that there were no changes in CAT activity in corn exposed to aluminum toxicity. This same CAT response was observed in Oryza sativa L. under light stress (Aumonde et al, 2013).…”

Section: Resultssupporting

confidence: 80%

Gene expression and antioxidant enzymatic activity in passion fruit exposed to aluminum

Pretti¹,

Luz²,

Perdigão³

et al. 2018

Afr. J. Agric. Res.

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The objective of this study was to investigate changes in enzymatic activity and gene expression related to antioxidant defense in two passion fruit cultivars (FB100 and FB200) exposed to aluminum. The specific activity of superoxide dismutase (SOD), catalase and ascorbate peroxidase were analyzed, in addition to their relative expression pattern. The characterization of gene expression was achieved by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) technique followed by densitometric analysis. Plants were irrigated every two days with a nutrient solution: pH 6; pH 4; 0.2 and 2.0 mM Al (pH 4). The leaves were collected at the times 0 h, 2 days, 5 days and 10 days. The analysis of the potential oxidative stress induced by aluminum demonstrated increased expression of catalase and superoxide dismutase gene, and only on the cultivar FB100 this increase was accompanied by an increase of SOD enzymatic activity, which indicates its higher efficiency on the removal of reactive oxygen species (ROS) compared to cultivar FB200.

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“…The activities of the SOD and CAT were the highest in the cucumber seedlings grown without supplementary light; exposure to supplementary light resulted in decreased activities of the SOD and CAT of the cucumber seedlings compared those grown without supplementary light. The increase in SOD activity in the seedlings that were not treated with supplementary light might be due to the increased production of superoxide radicals, consummating the dismutation of the superoxide radical to hydrogen peroxide [64]. Zhang et al [65] and Gong et al [66] reported similar results.…”

Section: Effects Of Supplementary Light Duration and Light Intensity On Activities Of Antioxidant Enzymes Of Cucumber Seedlingsmentioning

confidence: 76%

Morphological and Physiological Properties of Greenhouse-Grown Cucumber Seedlings as Influenced by Supplementary Light-Emitting Diodes with Same Daily Light Integral

Yan

Wang

et al. 2021

Horticulturae

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Insufficient light in autumn–winter may prolong the production periods and reduce the quality of plug seedlings grown in greenhouses. Additionally, there is no optimal protocol for supplementary light strategies when providing the same amount of light for plug seedling production. This study was conducted to determine the influences of combinations of supplementary light intensity and light duration with the same daily light integral (DLI) on the morphological and physiological properties of cucumber seedlings (Cucumis sativus L. cv. Tianjiao No. 5) grown in a greenhouse. A supplementary light with the same DLI of 6.0 mol m−2 d−1 was applied with the light duration set to 6, 8, 10, or 12 h d−1 provided by light-emitting diodes (LEDs), and cucumber seedlings grown with sunlight only were set as the control. The results indicated that increasing DLI using supplementary light promoted the growth and development of cucumber seedlings over those grown without supplementary light; however, opposite trends were observed in the superoxide dismutase (SOD) and catalase (CAT) activities. Under equal DLI, increasing the supplementary light duration from 6 to 10 h d−1 increased the root surface area (66.8%), shoot dry weight (24.0%), seedling quality index (237.0%), root activity (60.0%), and stem firmness (27.2%) of the cucumber seedlings. The specific leaf area of the cucumber seedlings decreased quadratically with an increase in supplementary light duration, and an opposite trend was exhibited for the stem diameter of the cucumber seedlings. In summary, increased DLI or longer light duration combined with lower light intensity with equal DLI provided by supplementary light in insufficient sunlight seasons improved the quality of the cucumber seedlings through the modification of the root architecture and stem firmness, increasing the mechanical strength of the cucumber seedlings for transplanting.

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Seed vigor, antioxidant metabolism and initial growth characteristics of red rice seedlings under different light intensities

Cited by 7 publications

References 16 publications

Growth and production of new superior rice varieties in the shade intensity

Growth and production of new superior rice varieties in the shade intensity

Gene expression and antioxidant enzymatic activity in passion fruit exposed to aluminum

Morphological and Physiological Properties of Greenhouse-Grown Cucumber Seedlings as Influenced by Supplementary Light-Emitting Diodes with Same Daily Light Integral

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