Article
Plant Sciences
Mehdi Zarei-Gavkosh, Reza Tavakkol Afshari, Mohammad Jahansooz
Summary: Smyrnium cordifolium Boiss, a biennial medicinal plant, is widely distributed in the Iranian-Turanian phytogeography region. Limited knowledge exists about the seed germination and dormancy of this species. The study revealed that the seeds of S. cordifolium did not germinate after 30 days of incubation at different temperatures, indicating that the seeds were dormant. Increasing the stratification period and temperature regimes had a positive effect on germination. Germination was observed after 4 weeks of incubation at 5 degrees C and peaked at 16 weeks. Darkness and gibberellin concentration also influenced germination.
JOURNAL OF APPLIED RESEARCH ON MEDICINAL AND AROMATIC PLANTS
(2022)
Article
Plant Sciences
Guoyan Wang, Carol C. Baskin, Jerry M. Baskin, Xuejun Yang, Guofang Liu, Xuehua Ye, Zhenying Huang
Summary: The timing of seed germination in alpine plants is regulated by dormancy, with seeds needing to germinate early in the spring to ensure seedlings can grow to a critical size during the short growing season. Factors such as burial time and dormancy cycle affect the germination timing and season, with seeds remaining dormant until optimal conditions for growth are met.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Chiung-Pin Liu, Shun-Ying Chen, Carol C. Baskin, Ching-Te Chien
Summary: The dormancy-breaking requirements and level of morphophysiological dormancy (MPD) were investigated for Ilex formosana, I. uraiensis, and I. rotunda seeds from subtropical and tropical regions of Taiwan. Warm stratification was found to break the shallow simple MPD of I. rotunda seeds. The seeds reached 50% germination after 11-45 weeks of warm stratification at 25/15°C. GA treatment increased the germination rate of I. formosana and I. rotunda (tropical) seeds but had no significant effect on I. uraiensis and I. rotunda (subtropical) seeds. These findings indicate that Ilex species in subtropical and tropical regions of Taiwan have non-deep simple and deep simple MPD, which can be broken by warm stratification. Additionally, GA treatment enhances the germination rate and percentage of Ilex seeds with non-deep simple MPD, while cold stratification promotes the seed germination rate of Ilex species with non-deep simple MPD in the tropical region.
SEED SCIENCE RESEARCH
(2023)
Article
Plant Sciences
Lei Zhang, Chaohan Xu, Huina Liu, Qingqing Wu, Jun Tao, Keliang Zhang
Summary: This study found that the seeds of Aconitum barbatum are in a state of undeveloped embryo dormancy, and natural winter cold stratification can break seed dormancy and promote germination in the following growing season.
Article
Agronomy
Lei Zhang, Chaohan Xu, Huina Liu, Jun Tao, Keliang Zhang
Summary: The timing of seed germination has a significant impact on plant fitness and life cycle. This study aimed to understand the dormancy type and identify the conditions necessary for breaking seed dormancy and promoting germination in Torilis scabra. The results showed that the seeds of T. scabra had non-deep simple morphophysiological dormancy and cold stratification and GA(3) treatment were effective in breaking dormancy.
Article
Agronomy
Chunyu Shao, Guanying Wang, Xin Ding, Chao Yang, Min Yan
Summary: Cold stratification effectively releases morphophysiological dormancy in Glehnia littoralis seeds, leading to increased CAT activity and levels of H2O2 and total soluble sugars, while decreasing coumarins. These physiological and biochemical changes play crucial roles in promoting dormancy release in G. littoralis seeds.
SEED SCIENCE AND TECHNOLOGY
(2021)
Article
Agronomy
Dali Chen, Zhen Yuan, Xinping Luo, Lingjie Yang, Xianglai Chen, Zuxin Zhang, Jingjing Wang, Xiaowen Hu
Summary: The study found that seed dormancy-break in alpine and desert species requires different soil moisture content and duration of cold stratification. Alpine species have higher optimal and critical soil moisture content for dormancy-break, but cold stratification duration is not related to habitat, seed mass, or seed shape.
Article
Plant Sciences
Samira Hashemirad, Elias Soltani, Ali I. Darbandi, Iraj Alahdadi
Summary: Seed germination is crucial for the establishment and growth of seedlings, and two factorial experiments were conducted to study seed dormancy and germination in fennel seeds. The results showed that cold stratification improved embryo growth and germination percentage. Additionally, seed size also affected germination rate, with larger seeds having higher germination rates.
JOURNAL OF APPLIED RESEARCH ON MEDICINAL AND AROMATIC PLANTS
(2023)
Article
Plant Sciences
Raquel Herranz Ferrer, Miguel A. Copete Carreno, Elena Copete Carreno, Pablo Ferrandis Gotor, Jose M. Herranz Sanz
Summary: The early stages of plant life cycle are crucial for the participation of species in plant communities. In this study, the requirements for dormancy breaking and germination of Helleborus foetidus seeds were analyzed. The seeds showed deep simple epicotyl morphophysiological dormancy (MPD), adapting well to temperate forest regions.
ACTA PHYSIOLOGIAE PLANTARUM
(2023)
Article
Plant Sciences
James E. Hourston, Tina Steinbrecher, Jake O. Chandler, Marta Perez, Katrin Dietrich, Veronika Tureckova, Danuse Tarkowska, Miroslav Strnad, Fridtjof Weltmeier, Juliane Meinhard, Uwe Fischer, Karin Fiedler-Wiechers, Michael Ignatz, Gerhard Leubner-Metzger
Summary: The dynamic behavior of seeds in soil seed banks depends on their ability to act as environmental sensors and adjust their germination sensitivity thresholds. A study showed that prolonged incubation of sugar beet fruits at low temperature can induce secondary non-deep dormancy in apparently nondormant crop species. The mechanisms behind this cold-induced secondary dormancy include the accumulation of abscisic acid, reduction in embryo growth potential, and a block in weakening the endosperm.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Horticulture
Keliang Zhang, Yusong Ji, Xiaomei Song, Linjun Yao, Huina Liu, Jun Tao
Summary: Seed germination and dormancy are crucial for the regeneration strategy of plants. This study focused on the dormancy characteristics and regeneration strategies of Clematis hexapetala seeds, revealing deep complex morphophysiological dormancy in freshly matured seeds. Natural cold stratification in winter breaks dormancy and allows the seeds to germinate at the start of the next growing season.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
Qiu-Xiong Yang, Dan Chen, Yan Zhao, Xiao-Yu Zhang, Min Zhao, Rui Peng, Nian-Xi Sun, Timothy Charles Baldwin, Sheng-Chao Yang, Yan-Li Liang
Summary: This study investigated the molecular mechanism of seed dormancy breaking at cold temperatures in Fritillaria taipaiensis and explored the genetic regulation of germination initiated by exposure to cold temperature. The results showed that stratification at 4 degrees Celsius induced an upregulation of gene expression involved in gibberellic acid and auxin biosynthesis, promoting embryo development and seed germination. This study provides valuable insights into the regulation of seed germination in F. taipaiensis and other non-model plant species.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Jing Zhang, Jia-Yi Qian, Yue-Hong Bian, Xiao Liu, Chun-Lei Wang
Summary: This study analyzed the transcriptome profiles of pear seeds during cold stratification, revealing the crucial role of hormones, carbohydrate metabolism, transcription factors, and lipid metabolism in the release of pear seed dormancy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Keliang Zhang, Haolei Pan, Carol C. Baskin, Jerry M. Baskin, Zuoming Xiong, Weizhang Cao, Linjun Yao, Bin Tang, Chuni Zhang, Jun Tao
Summary: This study investigated the temperature requirements for radicle and shoot emergence in P. ostii seeds and the correlation between these two stages of dormancy-break and seasonal temperature changes. Results showed that embryo length increased by about 330% before radicle emergence, and radicle emergence and shoot growth occurred in early October after seed dispersal. Shoot emergence was delayed until February when the temperature began to increase. ABA and GA analyses suggested that root dormancy might be due to high ABA content and shoot dormancy to low GA content.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Yuan Song, Mingyi Zhang, Yun Guo, Xiaoye Gao
Summary: Seed dormancy in Korean pine is characterized by a combination of morphological and physiological dormancy. The physiological dormancy is gradually released during the first winter, reinduced in the first summer, and broken again in the second autumn and winter. The morphological dormancy is slowly released over the first summer and rapidly broken during the second autumn. In the second spring, Korean pine seeds completely escape from morphophysiological dormancy.
JOURNAL OF PLANT ECOLOGY
(2023)