Article
Plant Sciences
Tereza Maskova, Peter Poschlod
Summary: Seed persistence in the soil is crucial for population dynamics. This study found that burial depth and species-specific seed traits affect soil seed persistence, with dormant seeds having lower viability and light and temperature requirements impacting seed persistence.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Yu Zhang, Shaochun Xu, Shidong Yue, Xiaomei Zhang, Yongliang Qiao, Mingjie Liu, Yi Zhou
Summary: Based on observations and experiments on eelgrass seeds in Swan Lake and Qingdao Bay in northern China, it was found that although the seeds matured at the same time, their germination time varied. Further analysis revealed that this difference was determined by internal molecular mechanisms rather than environmental factors. Comparative transcriptome analysis showed that eelgrass seeds in Swan Lake had a deeper dormancy depth and required the mobilization of more related genes to break dormancy and initiate germination compared to seeds in Qingdao Bay.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Agronomy
Gulshan Mahajan, Bhagirath Singh Chauhan
Summary: Understanding the germination pattern and seed longevity of Echinochloa colona in field conditions is crucial for effective weed management. The study found that the populations of E. colona exhibited innate dormancy, with some seeds capable of germinating in the next season. The research also indicated that seed persistence and germination patterns of E. colona can vary with different soil and agro-climatic conditions.
Article
Agronomy
Yuhua Zhang, Haitao Gao, Jiangyan Xu, Qinghu Liu, Liyao Dong
Summary: Weedy rice infestation is expanding in China as the proportion of direct-seeded rice systems increases. Limited herbicides are effective against weedy rice due to its similarity with cultivated rice. It is important to find non-chemical management strategies, one of which is reducing the seed bank size by inducing weedy rice germination.
Article
Plant Sciences
Rashid Saleem, Shane Campbell, Mary T. T. Fletcher, Sundaravelpandian Kalaipandian, Steve Adkins
Summary: This study aims to understand the dormancy mechanism of Pimelea trichostachya and how environmental conditions affect its germination and emergence. It concludes that P. trichostachya has a complex dormancy mechanism, involving physical, metabolic, and suspected water-soluble germination inhibitor components. The study also shows that scarified seeds treated with gibberellic acid (GA(3)) have the highest germination percentage, and emergence is inhibited when seeds are buried below 3 cm in soil.
Article
Plant Sciences
Sven K. K. Nelson, Yuri Kanno, Mitsunori Seo, Camille M. M. Steber
Summary: The ability of seeds to germinate after dry storage is improved through the process of after-ripening. Abscisic acid (ABA) stimulates seed dormancy, while gibberellin A (GA) promotes dormancy loss and germination. Dry after-ripening decreases ABA levels and increases GA levels in imbibing seeds, leading to enhanced germination capacity. The hormone levels affect the timing of germination, with GA acting before ABA levels decline. Overexpression of the GA receptor GID1b has different effects on germination in different contexts.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Horticulture
Javier Sanchez, Francisco Albornoz, Samuel Contreras
Summary: This study investigated the effect of nitrogen fertilization on tomato seed yield and quality. The results showed that increasing nitrogen fertilization led to a decrease in seed weight, but had no effect on standard germination and mean germination time. The germination percentage and rate decreased when seeds were immersed in solutions with reduced osmotic potential, but this effect was less pronounced in seeds from the high nitrogen treatment. Additionally, seeds from the high nitrogen treatment exhibited greater longevity when evaluated after accelerated aging.
Article
Forestry
Shiferaw Alem Munie, Hana Habrova, Katerina Houskova, Lukas Karas
Summary: This study focused on breaking the seed dormancy of Dracaena steudneri Schweinf. Ex Engl. seeds using different presowing treatments. However, the results showed that the treatments did not improve the germination rates of the seeds. More research on the seed ecophysiology of this species is recommended.
Article
Multidisciplinary Sciences
Ahlam Khalofah
Summary: This study demonstrates that mechanical scarification is effective in improving seed germination of Juniper seeds, with significant improvements observed in seedling traits when utilizing 5 Mm potassium nitrate.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Engineering, Environmental
Jinfeng Li, Huie Chen, Xiang Gao, Qi Ding, WenChong Shan, Haotian Guo, Jinpeng Zhuo
Summary: Desiccation crack is a significant factor contributing to engineering and environmental disasters. This study conducted tests on lean clay samples with different dryness degrees under wet-dry (WD) cycles and wet-dry-freeze-thaw (WDFT) cycles to analyze crack formation and development. The results show that the crack ratio and width decrease with higher dryness degree under consecutive WD cycles, while samples subjected to WDFT cycles exhibit higher crack ratio and wider cracks. Under lower dryness degree, the crack ratio and width remain relatively unchanged after each WD cycle, mainly consisting of small, shallow, and densely distributed sub-cracks. The research findings provide valuable insights into soil crack evolution and its mechanisms under complex environmental conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Plant Sciences
Thomas Martin Arceo-Gomez, Erika Robles-Diaz, Mayra D. Manrique-Ortega, Angel Roberto Martinez-Campos, Jose Luis Aragon-Gastelum, Francisco Javier Aguirre-Crespo, Jorge E. Ramirez-Albores, Marlin Perez-Suarez, Rafael Robles, Javier Reyes-Trujeque, Aaron A. Can-Estrada, Eduardo J. Gutierrez-Alcantara, Bardo H. Sanchez-Soto, Pedro Zamora-Crescencio
Summary: The study focused on Enterolobium cyclocarpum and Piscidia piscipula seeds, examining their permeability, imbibition rate, and response to pre-germinative treatments. Both species showed high viability, with E. cyclocarpum having low permeability and imbibition rate. Mechanical scarification promoted germination in E. cyclocarpum, while a 10-second boiling water treatment was optimal for P. piscipula. The presence of physical dormancy was confirmed in both species.
Article
Agronomy
Stefano Benvenuti, Marco Mazzoncini
Summary: The ability of weed seeds to survive and emerge from different soil textures and burial depths is influenced by factors such as soil texture, seed weight, and the maximum hypocotyl elongation. The inhibitory effects on seed emergence are found to be more pronounced in clay soil compared to sandy soil. Evaluating the performance of buried seed banks in different soil textures can help improve the forecast models of emergence dynamics and lead to more rational and sustainable weed management practices.
Article
Forestry
Alejandro Garrido, Maria Fernandez-Gonzalez, Rosa A. Vazquez-Ruiz, F. Javier Rodriguez-Rajo, Maria J. Aira
Summary: North-western Spain has seen an increase in the cultivated area of olive trees. This study aimed to determine the characteristics of olive trees in the most northerly new plantation areas of the Iberian Peninsula, finding that the vegetative period of the olive tree in the study area lasted an average of 259 days, with flowering as the shortest stage.
Article
Horticulture
Xiaoyi Ma, Chengzhong Wang, Zehua Xiao, Ji Yang, Yonghong Hu, Yuguo Wang, Wenju Zhang, Linfeng Li, Zhiping Song
Summary: The germination of Paeonia ostii seeds is dependent on a warm-cold-warm temperature sequence, with warm stratification breaking physiological dormancy of the embryo and cold stratification breaking dormancy of the epicotyl. The results indicate that P. ostii seeds have morphophysiological dormancy.
SCIENTIA HORTICULTURAE
(2023)
Article
Agricultural Engineering
Matthew A. Ott, Gary Gardner, Krishan M. Rai, Donald L. Wyse, M. David Marks, Ratan Chopra
Summary: Efforts are being made to domesticate the winter annual oilseed cover crop, pennycress, to address global food security and ecosystem challenges. Key alleles have been introgressed, but seed dormancy remains a weedy trait. Experiments have shown that introducing mutations in the TRANSPARENT TESTA 2 gene can potentially overcome seed dormancy issues, making pennycress more attractive for growers. Further research is needed to understand the transparent testa mutants' response to abiotic stress conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2021)