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  • Open Access


    Molecular Mechanism Underlying Plant Response to Cold Stress

    Yiwei Cao, Delight Hwarari, Yasmina Radani, Yuanlin Guan, Liming Yang*

    Phyton-International Journal of Experimental Botany, Vol.92, No.9, pp. 2665-2683, 2023, DOI:10.32604/phyton.2023.024929

    Abstract Low temperature stress is one of the most important factors limiting plant growth and geographical distribution. In order to adapt to low temperature, plants have evolved strategies to acquire cold tolerance, known as, cold acclimation. Current molecular and genomic studies have reported that annual herbaceous and perennial woody plants share similar cold acclimation mechanisms. However, woody perennials also require extra resilience to survive cold winters. Thus, trees have acquired complex dynamic processes to control the development of dormancy and cold resistance, ensuring successful tolerance during the coldest winter season. In this review, we systemically described how woody plants perceive and… More >

  • Open Access


    The Genetic and Biochemical Mechanisms Underlying Cereal Seed Dormancy

    Sasa Jing1, Yuan Tian1, Heng Zhang2, John T. Hancock3, Ying Zhu2,*, Ping Li1,*

    Phyton-International Journal of Experimental Botany, Vol.92, No.4, pp. 1203-1214, 2023, DOI:10.32604/phyton.2023.026305

    Abstract The crop seeds have been a staple food for humans, and seed yield is important for sustaining agriculture development and enhancing human adaptability to food risks. The phenomenon of pre-harvest sprouting (PHS), caused by seed dormancy deficiency, and the phenomenon of low seedling emergence caused by seed deep dormancy, will lead to a reduction in agricultural production. Therefore, it is particularly important to understand the regulation mechanisms of seed dormancy. There are many studies on the regulation of seed dormancy in rice, but there are few studies on the regulation of seed dormancy in other crops, and the research on… More >

  • Open Access


    Do Strigolactones Regulate Bud Winter Dormancy and Charactrisitc Secondary Metabolism in Tea?

    Lin Feng1, Ziming Gong1,*, Guofeng Liu2, Yanli Liu1

    Phyton-International Journal of Experimental Botany, Vol.90, No.1, pp. 65-73, 2021, DOI:10.32604/phyton.2020.012303

    Abstract Tea (Camellia sinensis [L.] O. Kuntze.) is an important cash crop, which mainly uses tender shoots and young leaves for manufacturing. Due to the marketing characteristic that earlier made tea has higher price, the time of the breaking of winter dormancy buds in spring is extremely important in tea industry. Strigolactones are a group of carotenoids-derived metabolites which regulates bud outgrowth, shoot branching, tiller angle and environmental stress responses. The role of strigolactones in tea plant was briefly summarized in the current review, with an emphasis of the association of strigolactones on bud ecodormancy and shoot branching. The involvement of… More >

  • Open Access


    Seed Germination Traits of Loquat (Eriobotrya japonica Lindl.) as Affected by Various Pre-Sowing Treatments (Cutting of Cotyledons, Removal of Perisperm, Moist Chilling and/or Exogenous Application of Gibberellin)

    Thiresia-Teresa Tzatzani1, Evangelia Basdeki2, Evangelia-Vasiliki Ladikou3, Marios-Ioannis N. Sotiras3, Georgios Panagiotakis4, Sryridon Lionakis4, Ioannis E. Papadakis3,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 645-656, 2020, DOI:10.32604/phyton.2020.010532

    Abstract The purpose of this study was to investigate the effects of various presowing treatments on the germinability (final germination percentage) and germination rate of loquat seeds in order to increase seedling production in nurseries (applied research) as well as provide answers for important physiological issues related to loquat seeds and their seed coat (basic research). Three experiments were carried out with various pre-sowing treatments. These treatments included full or partial removal of seed coat (perisperm), partial cutting of cotyledons as well as moist chilling at 5°C for 13 days and/or soaking the seeds in water or 250 ppm gibberellic acid… More >

  • Open Access


    Carbon Monoxide Signal Breaks Primary Seed Dormancy by Transcriptional Silence of DOG1 in Arabidopsis thaliana

    Danni He, Guoli Deng, Songpei Ying, Wenjuan Yang, Jiali Wei, Ping Li*

    Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 633-643, 2020, DOI:10.32604/phyton.2020.010498

    Abstract Primary seed dormancy is an adaptive strategy that prevents germination for viable seeds in harsh environment, ensuring seeds germination under favorable condition. Accurately inducing seeds germination in a controllable manner is important for crop production. Thus searching the chemicals that efficiently breaks seed dormancy is valuable. DOG1 protein abundance in the freshly harvested seed is high, and its level is correlated to seed dormancy intensity, thus DOG1 is regarded as the timer to evaluate the seed dormancy degree. In this study, we found the carbon monoxide (CO) donor treatment, the transgenic line with high CO content, showed lower seed dormancy,… More >

  • Open Access


    Teaching an Old Dog a New Trick: Multifaceted Strategies to Control Primary Seed Germination by DELAY OF GERMINATION 1 (DOG1)

    Ping Li*, Huanhuan Ni, Songbei Ying, Jiali Wei, Xiangyang Hu

    Phyton-International Journal of Experimental Botany, Vol.89, No.1, pp. 1-12, 2020, DOI:10.32604/phyton.2020.09817

    Abstract Primary seed dormancy is a critical trait for sustainable agricultural development, ensuring seed germination under favorable conditions. The induction, maintenance and release of seed dormancy is a complicated physiological process that is strictly controlled by a variety of endogenous signals and environmental factors. In Arabidopsis, DOG1 (DELAY OF GERMINATION 1) is identi- fied as the main quantitative trait locus (QTL) of seed dormancy, which contributes to deep dormancy in the Cvi ecotype. In recent years, considerable progress has been made to elucidate the molecular regulatory mechanism by which DOG1 controls seed dormancy. In this review, we describe a series of… More >

  • Open Access


    Germination of Gutierrezia solbrigii and Senecio subulatus, endemic Asteraceae from Argentina

    Masini ACA1, AE Rovere1, GI Pirk1,2

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 314-323, 2016, DOI:10.32604/phyton.2016.85.314

    Abstract Asteraceae is the most diverse family of vascular plants in the world and the most numerous in Argentina, with 26% of endemic species. Many Asteraceae are pioneer species facilitating the establishment of other species, and several have been employed in restoration. Knowing the characteristics of seeds and their germination is crucial to employ them in restoration projects; hence this study explored basic physiological aspects of the germination of Gutierrezia solbrigii Cabrera and Senecio subulatus D. Don ex Hook. & Arn. var. erectus Hook. & Arn., two endemic shrubs of Argentina, distributed in arid Patagonia. Seeds came from the Reserva Provincial… More >

  • Open Access


    Floral differentiation and growth rhythm of rhizome buds of the spring ephemeroid plant Adonis amurensis Regel et Radde

    Liu XL1,2, JH Li2,3, JY Zhu2, YF Yang1

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 297-304, 2016, DOI:10.32604/phyton.2016.85.297

    Abstract Spring ephemeroid plants complete their aboveground reproduction and growth during the short growing season, and may go dormant subsequently underground. Little is known about the underground dormancy and biological activities of the plants. In this study, we observed organogenesis and growth rhythm of rhizome buds of Adonis amurensis Regel et Radde, a spring ephemeroid plant from the Changbai Mountains in northeastern China. Our results showed that A. amurensis did not go through summer dormancy, but started producing mixed buds on rhizomes soon after the aboveground parts had died. The buds grew in length and diameter following an exponential model with… More >

  • Open Access


    Anatomical and chemical characteristics of the seed coat of Medicago sativa L. (alfalfa) cv. Baralfa 85 seeds and their association with seed dormancy

    Galussi AA1, JA Argüello2, MM Cerana2, M Maximino3, ME Moya1

    Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 163-175, 2015, DOI:10.32604/phyton.2015.84.163

    Abstract Seeds of alfalfa (Medicago sativa L.) can exhibit seedcoat imposed dormancy, which produces hard seeds within a seed lot. These seeds do not germinate because they do not imbibe water due to a barrier to water entry in the seed coat. The aim of this work was to analyze the anatomical and chemical characteristics of the testa of alfalfa seeds with respect to water permeability levels. The anatomy of seeds of the cv. Baralfa 85 was studied and structural substances, polyphenols, tannins and cutin present in the testa of seeds of different water permeability levels were determined. The anatomical characteristics… More >

  • Open Access


    Seed dormancy release and germination characteristics of Corispermum lehmannianum Bunge, an endemic species in the Gurbantunggut desert of China

    Zhang LW1, HL Liu2*, DY Zhang2, WG Bian2

    Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 58-63, 2015, DOI:10.32604/phyton.2015.84.058

    Abstract Seed dormancy release and germination of Corispermum lehmannianum Bunge were tested using various treatments: temperature, cold stratification, gibberelins (GA3), dry storage and sand burial. Results showed that temperature and light did not affect the germination of fresh seeds, cold stratification and GA3 could improve seed germination, whereas dry storage and sand burial did not. The germination percentage was highest at 35/20 °C after the cold stratification and GA3 treatments. Corispermum lehmannianum seeds were classified as non-deep, Type-2, physiological dormancy (PD), whose seed dormancy could be released by cold stratification and GA3. More >

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