Seed Priming with Chitosan Improves Germination Characteristics Associated with Alterations in Antioxidant Defense and Dehydration-Responsive Pathway in White Clover under Water Stress

Ling, Yao; Zhao, Yue; Cheng, Bizhen; Tao, Meng; Zhang, Yan; Zhou, Li

doi:10.3390/plants11152015

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…For the temperature of 30 • C (Figure 4B), it required 13 and 22 DAS for osmotic potentials of 0 and −0.3 MPa, respectively. Similar to the present study, germination time was also increased for seeds of white clover (Trifolium repens) in response to water deficit [68]. This was likely due to water restriction promoting longer stays of the seeds in Phase II of the germination process, as reported by Bewley et al [31].…”

Section: Experiments Ii: Germination and Vigor Of Seeds Under Differe...supporting

confidence: 90%

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

de Freitas,

Gomes,

da Silva

et al. 2024

Agronomy

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Physalis peruviana holds significant economic value, making it crucial to determine optimal cultivation conditions, particularly concerning seed germination under varying water and temperature conditions. Therefore, this study aimed to assess the impacts of heat and water stress on the germination and vigor of P. peruviana seeds. The study was divided into two trials: the first examined the effect of constant temperatures of 10, 15, 20, 25, 30, 35, and 40 °C and alternating temperatures of 20 °C during the dark period and 30 °C during the light period (control) on seed germination and vigor. The second trial investigated germination and vigor under different water and thermal conditions using various osmotic potentials (0; −0.3; −0.6; and −0.9 MPa) and two temperatures (constant 30 °C and alternating 20 °C during the dark period and 30 °C during the light period). Both trials used a 16 h photoperiod. The germination tests revealed optimal (30 °C), moderate (20/30 °C), minimal (20 °C), and inhibited (40 °C) temperatures for the species’ germination. It was found that the first germination count could be conducted on the seventh day after sowing. Low water availability had negative effects on seed germination and vigor, especially at osmotic potentials below −0.45 and −0.61 MPa, combined with temperatures of 30 and 20/30 °C, respectively. Severe water stress, with osmotic potentials equal to or below −0.9 MPa, completely inhibited seed germination and vigor. Reduction in water potential and increased temperature resulted in a significant decrease in the percentage, speed, and quality of P. peruviana germination. These findings indicate that the species does not tolerate extreme temperatures, whether low (less than 15 °C) or high (greater than 35 °C), nor water stress with osmotic potentials lower than −0.45 MPa, much less the combination of these factors.

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Section: Experiments Ii: Germination and Vigor Of Seeds Under Differe...supporting

confidence: 90%

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

de Freitas,

Gomes,

da Silva

et al. 2024

Agronomy

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show abstract

“…First of all, there is the direct effect of chitosan. The positive effect of chitosan with different characteristics on the length and branching of the root system, as well as on the root microstructure, has been previously described in a number of studies [ 26 , 27 , 28 , 29 ] on different crops. The authors in [ 30 ] found that the number of lateral roots, root length, root hair density, and total root weight of Arabidopsis and lettuce plants increased under the influence of chitosan (MW about 1500 kDa, DD > 87%) or chitosan microparticles at a concentration of 1–10 µg/mL.…”

Section: Resultsmentioning

confidence: 93%

Effect of Seed Priming with Chitosan Hydrolysate on Lettuce (Lactuca sativa) Growth Parameters

et al. 2023

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Seed priming increases germination, yield, and resistance to abiotic factors and phytopathogens. Chitosan is considered an ecofriendly growth stimulant and crop protection agent. Chitosan hydrolysate (CH) is an unfractionated product of hydrolysis of high-molecular-weight crab shell chitosan with a molecular weight of 1040 kDa and a degree of deacetylation of 85% with nitric acid. The average molecular weight of the main fraction in CH was 39 kDa. Lettuce seeds were soaked in 0.01–1 mg/mL CH for 6 h before sowing. The effects of CH on seed germination, plant morphology, and biochemical indicators at different growth stages were evaluated. Under the 0.1 mg/mL CH treatment, earlier seed germination was detected compared to the control. Increased root branching was observed, along with 100% and 67% increases in fresh weight (FW) at the 24th and 38th days after sowing (DAS), respectively. An increase in the shoot FW was found in CH-treated plants (33% and 4% at the 24th and 38th DAS, respectively). Significant increases in chlorophyll and carotenoid content compared to the control were observed at the 10th DAS. There were no significant differences in the activity of phenylalanine ammonia-lyase, polyphenol oxidase, β-1,3-glucanase, and chitinase at the 24th and 38th DAS. Seed priming with CH could increase the yield and uniformity of plants within the group. This effect is important for commercial vegetable production.

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“…CS/TPP NPs treatment at a higher dose of 0.04% led to a maximum increase in mean CL 25.2 mm ( Figure 9B ). Seed priming with bulk chitosan and nano-engineered chitosan has been described for improved germination and seedling establishment ( Ling et al, 2022 ; Samaneh Attaran Dowom et al, 2022 ). The mean coleoptile length for the control treatment (water) was recorded to be 15.0 mm.…”

Section: Resultsmentioning

confidence: 99%

Zn nutrients-loaded chitosan nanocomposites and their efficacy as nanopriming agents for maize (Zea mays) seeds

Zungu,

Kamdem Paumo,

Gaorongwe

et al. 2023

Front. Chem.

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Recent breakthroughs in agro-inputs research have led to the development of nanomaterials that can promote precision agriculture and better environmental security. The agricultural sector is increasingly facing the negative impacts of changing climates due to various stress conditions. To curb this scenario, economical and low-risk practices such as decreasing fertilizer inputs and seed priming have been promoted. In the current study, the H. odoratissimum aqueous extract was used to nucleate the Zn ionic species and grow the zinc oxide nanoparticles (ZnO NPs). The developed nanocomposites and their ionic zinc precursor were then integrated into tripolyphosphate (TPP)-crosslinked chitosan (CS/TPP) nanostructures by ionic gelation. Advanced physicochemical characterization techniques (SEM, EDS, TEM, DLS, FTIR, TGA, and XPS) were exploited to report the morphology, hydrodynamic size, surface charge, and structural organization of the developed nanomaterials. These revealed positively charged particles with hydrodynamic size in the 149–257 nm range. The NPs were used as priming agents for Zea mays seeds. At 0.04%, the ZnO-loaded CS/TPP NPs achieved higher root and shoot elongation in 10-day old seedlings compared to other treatments. The pristine CS/TPP NPs, Zn(II)-laden CS/TPP NPs, and ZnO-loaded CS/TPP NPs at 0.01% significantly promoted the early seedling development of seeds under salt stress. This represents the first report showing ZnO integrated chitosan nanocomposites as an auspicious nanopriming agent for stimulating the seed germination of maize. The study envisages offering perspectives on utilizing green nanotechnology to improve the early seedling development of maize. Furthermore, it has the potential to contribute towards UN SDG 2, thus addressing the threats to global food insecurity and doubling agricultural productivity by 2030.

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Seed Priming with Chitosan Improves Germination Characteristics Associated with Alterations in Antioxidant Defense and Dehydration-Responsive Pathway in White Clover under Water Stress

Cited by 12 publications

References 52 publications

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

Effect of Seed Priming with Chitosan Hydrolysate on Lettuce (Lactuca sativa) Growth Parameters

Zn nutrients-loaded chitosan nanocomposites and their efficacy as nanopriming agents for maize (Zea mays) seeds

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