The role of phytochrome-mediated gibberellic acid signaling in the modulation of seed germination under low light stress in rice (O. sativa L.)

Panda, Darshan; Mohanty, S.; Das, Swagatika; Sah, Rameswar Prasad; Kumar, Awadhesh; Behera, Lambodar; Baig, M. J.; Tripathy, Baishnab C.

doi:10.1007/s12298-022-01167-7

Cited by 5 publications

(3 citation statements)

References 61 publications

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“…Low light usually leads to the elongation of stems (Tan et al 2018, Liang et al 2022. In contrast, the stem length of S. trilobata decreased, possibly because low light reduced the content of GA in S. trilobata or its sensitivity to GA (Panda et al 2022). Fewer leaf pairs and branch numbers reduce the consumption of organic matter and funnel energy to other processes to ensure sufficient resources for the adaptation to low-light stress (Jha et al 2008, Chen et al 2017.…”

Section: S Trilobata Optimizes Resource Allocation and Reduces Change...mentioning

confidence: 99%

Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment

Ke¹,

Pan²,

CHEN³

et al. 2022

Photosynt.

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In stressful environments, invasive plants acclimate more efficiently than native plants and hybridization mainly contributes to this process. We examined changes in the morphological characteristics, photosynthetic characteristics, and antioxidant capacity of Sphagneticola trilobata and its hybrids in a low-light environment to explore their invasiveness, with Sphagneticola calendulacea serving as the control. The morphological plasticity of S. trilobata was not dominant, the maximal photochemical efficiency of PSII, actual quantum yield of PSII, and electron transport rate of PSⅡ increased and nonphotochemical quenching decreased, while S. calendulacea and the hybrid produced opposite results. S. trilobata showed fewer spots stained for reactive oxygen species in tissues, with an increase in superoxide dismutase activity. Although S. trilobata is a heliophilous plant, we found that the shade tolerance of S. trilobata and the hybrid were stronger than that of S. calendulacea, which may be one important mechanism of invasion. Highlights• Shading promoted the plant height but decreased the stem length of Sphagneticola trilobata • S. calendulacea has the strong photosynthetic capacity and antioxidant activity in the shade • Shade tolerance of the hybrid is more efficient than that of S. calendulacea

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Section: S Trilobata Optimizes Resource Allocation and Reduces Change...mentioning

confidence: 99%

Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment

Ke¹,

Pan²,

CHEN³

et al. 2022

Photosynt.

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show abstract

“…When seeds are exposed to red light, phytochrome molecules in their inactive Pr form convert to the active Pfr form. Tis conversion initiates a signaling cascade, including changes in gene expression, ultimately leading to increased production of α-amylase [32]. Interestingly, our fndings indicate that the R70 : B30 light combination is the most efective in promoting seed germination and α-amylase activity in motherwort.…”

Section: Resultsmentioning

confidence: 71%

Light-Emitting Diode Light Quality Influences Germination and Sprout Characteristics of Motherwort

Lee,

Zebro,

Heo

2023

Journal of Food Quality

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Motherwort (Leonurus japonicus Houtt) is an important medicinal plant known for its excellent antioxidant properties. Nonetheless, in South Korea, its availability remains limited due to the challenge of low seed germination rates, affecting field production. To tackle this problem, it is imperative to focus on controlled production methods. In our study, we conducted experiments in a laboratory setting, employing various combinations of light-emitting diode (LED) lights to cultivate motherwort. The influence of LED light quality on seed germination, initial growth, and functionality of motherwort is evaluated. The germination rate of motherwort ranged from 36.1 ± 7.35% to 75.0 ± 1.60%, and the highest value was observed in the red LED 100% treatment. The mean shoot length also varied depending on LED light quality. The longest shoot length (3.45 ± 0.13 g) was obtained in the red LED 100% treatment. The highest shoot weight (0.266 ± 0.011 cm) and root weight (0.051 ± 0.008 cm) were obtained in the red LED 70% and blue LED 30% mixed treatment. The total phenolic content of the motherwort sprout ranged from 2.50 ± 0.30 mg GAE/g to 3.01 ± 0.09 mg GAE/g, with the highest value from the white LED (control) treatment, but no significant differences were observed among the treatments. The red LED 30% and blue LED 70% mixed treatment showed the highest total flavonoid content (11.62 ± 0.79 mg QE/g) and DPPH radical scavenging activity (57.64 ± 2.95%). The red LED 70% and blue LED 30% mixed treatment had a similar level of DPPH scavenging activity as the control, and there was no positive or negative effect on the functionality of motherwort sprout. Overall, the results suggest that the red LED 70% and blue LED 30% mixed treatment can be effectively used to increase productivity in motherwort without decreasing its important quality.

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“…GA3 is resistant for decay and remains active in soil for months. The Environmental Protection Agency (EPA) has determined using it only in low doses (Panda et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Toxic Effects of Chronic Use of Gibberellic Acid on Liver and Kidney and Hematological Study in Male Albino Rats

Bayoumy,

Abd El Salam,

ali

et al. 2023

Zagazig Journal of Forensic Medicine

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Introduction: Gibberellic acid (GA3) plays important roles in many cellular processes including promoting stem elongation, and mobilization of food reserves in grass seed germination, juvenility, and sex expression. The aim of the work: To detect the possible toxic effects of GA3 on liver and kidney histopathology and effect on indicators of oxidative stress levels. Material and Methods: Seventy-five rats were included in the study and divided into two groups of animals (50 rats in treatment group and 25 rats in recovery group). The first group (treatment group) divided into 5 equal subgroups of rats (10 rats each) which were negative control group (G0T) received only distilled water, positive control treatment subgroup (G1T) received diluted sodium hydroxide in distilled water which are vehicle for GA3, subgroup G2T received 1/10 of LD50 (630 mg/kg) of GA3, subgroup G3T received 1/20 LD50 (315 mg/kg) of GA3, and subgroup G4T received 1/40 LD50 (157 mg/kg) of GA3. Treatment groups treated with GA3 orally by gavage for 12 weeks then salvaged by decapitation. The second group (recovery group) containing 25 rats that were treated with same manner as treatment groups for 12 weeks then kept after the treatment for recovery period for 2 weeks then salvaged to detect its cumulative effect. Recovery group divided into 5 equal subgroups (5 rats in each group) which were negative control recovery group (G0R), positive control recovery subgroup (G1R), subgroup G2R, subgroup G3R, and subgroup G4T. In all subgroups, liver and kidney tissue samples were taken to measure level of hepatic MDA concentration, hepatic catalase activity and examine hepatic and renal histopathologic changes. Results: hepatic MDA was significantly increased in all treatment and recovery groups in comparison to both control groups and level was directly proportional to dose of GA3 administered. There was significant reduction in the hepatic catalase enzyme activity in all treatment groups than the control treatment group especially in the group of highest doses (G2T). After the recovery period, the hepatic catalase enzyme activity continued to drop than its level after the treatment period, especially in the group (G2R). Histopathological examination revealed marked necrosis of tissues of, and the recovery period couldn't restore these pathological changes due to the cumulative effects of GA3 on the liver and kidneys. Conclusion and recommendation: GA3 possess risk to human health due to oxidative damage to tissues such as liver and kidney. Use of GA3 should be cautious, and its level in agricultural products should be regularly controlled.

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The role of phytochrome-mediated gibberellic acid signaling in the modulation of seed germination under low light stress in rice (O. sativa L.)

Cited by 5 publications

References 61 publications

Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment

Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment

Light-Emitting Diode Light Quality Influences Germination and Sprout Characteristics of Motherwort

Toxic Effects of Chronic Use of Gibberellic Acid on Liver and Kidney and Hematological Study in Male Albino Rats

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