scholarly journals Towards the Identification of New Genes Involved in ABA-Dependent Abiotic Stresses Using Arabidopsis Suppressor Mutants of abh1 Hypersensitivity to ABA during Seed Germination

2013 ◽  
Vol 14 (7) ◽  
pp. 13403-13432 ◽  
Author(s):  
Agata Daszkowska-Golec ◽  
Edyta Chorazy ◽  
Miroslaw Maluszynski ◽  
Iwona Szarejko
Keyword(s):  
Seed Germination ◽  
Abiotic Stresses ◽  
New Genes ◽  
Suppressor Mutants

Seed germination and biochemical responses of two Elytrigia elongata accessions exposed to abiotic stresses

2021 ◽  
Author(s):  
Xiaoxia Tian ◽  
Peichun Mao ◽  
Mingli Zheng ◽  
Qingyi Meng ◽  
Lin Meng
Keyword(s):  
Seed Germination ◽  
Abiotic Stresses ◽  
Biochemical Responses

scholarly journals Storage Period and Different Abiotic Factors Regulate Seed Germination of Two Apocynum Species — Cash Crops in Arid Saline Regions in the Northwestern China

2021 ◽  
Vol 12 ◽  
Author(s):  
Li Jiang ◽  
Chaowen She ◽  
Changyan Tian ◽  
Mohsin Tanveer ◽  
Lei Wang
Keyword(s):  
Seed Germination ◽  
Abiotic Stresses ◽  
Arid Regions ◽  
Natural Fiber ◽  
Abiotic Factors ◽  
Light Condition ◽  
Storage Period ◽  
Germination Percentage ◽  
Environmental Benefits ◽  
Degraded Land

On degraded land in arid regions, cultivation of Apocynum species can provide significant environmental benefits by preventing soil erosion and desertification. Furthermore, Apocynum venetum and Apocynum pictum, which are mainly distributed in salt-barren lands in the northwestern region of China, are traditionally used to produce natural fiber and herbal tea. Direct sowing of both species may encounter various abiotic stresses such as drought and salinity. However, these effects on germination remain largely unknown, especially for seeds with different storage periods. The aim of this study was to evaluate the effects of storage period, light condition, temperature regime, drought, and salinity on germination performances of both species. Germination experiment was carried out in November 2017. There were four replicates for each treatment, and each petri dish contained 25 seeds. The results indicated that prolongation of storage period significantly decreased the germination percentage and velocity, especially under abiotic stresses. Light did not affect seed germination of A. venetum and A. pictum under any conditions. Seeds had better germination performance at 10/25 and 15/30°C than those of seeds incubated at any other temperatures. With the increase of polyethylene glycol (PEG) and salinity concentrations, seed germination for both species gradually decreased, especially for seeds stored for 2 years. Low PEG (0–20%) and salinity concentration (0–200 mM) did not significantly affect germination percentage of freshly matured seeds. However, long-time storage significantly decreased drought and salinity tolerance in A. venetum and A. pictum during germination stage. For saline soils in arid and semi-arid regions, freshly matured seeds or 1-year-stored seeds of both Apocynum species are recommended to be sown by using drip-irrigation in spring.

The effect of heat stress on quinoa (cv. Titicaca) under controlled climatic conditions

2020 ◽  
Vol 158 (4) ◽  
pp. 255-261
Author(s):  
Jorge Alvar-Beltrán ◽  
Leonardo Verdi ◽  
Anna Dalla Marta ◽  
Abdalla Dao ◽  
Roberto Vivoli ◽  
...  
Keyword(s):  
Heat Stress ◽  
Seed Germination ◽  
Seed Yield ◽  
Abiotic Stresses ◽  
Chenopodium Quinoa ◽  
Heavy Precipitation ◽  
Germination Percentage ◽  
Climatic Conditions ◽  
Stress Conditions ◽  
African Region

AbstractQuinoa (Chenopodium quinoa Willd.) is capable of adapting to multiple environments and tolerating abiotic stresses including saline, drought and frost stress conditions. However, the introduction of quinoa into new environments has disclosed adaptation challenges. The principle factor affecting crop pollination is heat stress at flowering, which leads to sterile plants. To investigate the effect of high temperatures during the sensitive phenological phases, flowering and seed germination, a Danish-bred cultivar (cv. Titicaca) was grown in climatic chambers. Selection of the cv. Titicaca was based on the fact that it is the most extensively used cultivar in the Sahel and Middle East and North African region. The results of this research demonstrated that temperatures exceeding 38 °C hindered seed germination and pollination, and therefore, seed yield at harvest. At 38 °C, seed yield losses were 30%, whilst seed germination percentage declined below 50%. In addition, the results of the present research were compared with field observations from Burkina Faso in order to determine the spatiotemporal suitability of this crop with respect to temperature stress. Although many other abiotic stresses need to be considered when defining crop calendars (e.g. heavy precipitation in July and August), this research proposes the following growing periods to avoid heat-stress conditions at flowering: Sahel (July–September and November–February), Soudano–Sahel (June–February) and Soudanian zone (all year round).

scholarly journals Overexpression of the NDR1/HIN1-Like Gene NHL6 Modifies Seed Germination in Response to Abscisic Acid and Abiotic Stresses in Arabidopsis

PLoS ONE ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. e0148572 ◽  
Author(s):  
Yan Bao ◽  
Wei-Meng Song ◽  
Jing Pan ◽  
Chun-Mei Jiang ◽  
Renu Srivastava ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Abiotic Stresses

scholarly journals Arabidopsis suppressor mutant of abh1 shows a new face of the already known players: ABH1 (CBP80) and ABI4—in response to ABA and abiotic stresses during seed germination

2012 ◽  
Vol 81 (1-2) ◽  
pp. 189-209 ◽  
Author(s):  
Agata Daszkowska-Golec ◽  
Weronika Wojnar ◽  
Marta Rosikiewicz ◽  
Iwona Szarejko ◽  
Miroslaw Maluszynski ◽  
...  
Keyword(s):  
Seed Germination ◽  
Abiotic Stresses

scholarly journals Genes gained and lost during the evolution and domestication of Brassica napus

2020 ◽  
Author(s):  
Hong Zhou ◽  
Xueling Ye ◽  
Yanling Ma ◽  
Haiyan Hu ◽  
Yuming Wei ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Abiotic Stresses ◽  
Agronomic Traits ◽  
Metabolic Process ◽  
Short History ◽  
Biotic And Abiotic Stresses ◽  
New Genes ◽  
Large Numbers ◽  
History Of Evolution ◽  
History Of

Abstract Background: Brassica napus is one of the most important sources of vegetable oil for human nutrition and biofuel. It is an allotetraploid formed about 7500 years ago by hybridization between B. rapa and B. oleracea. Results from earlier studies show that the allopolyploidization process was accompanied by rapid and intensive changes and abundant homoeologous exchanges between the subgenomes have been accumulated during its short history of evolution. Results: By comparing differences between 19 artificially synthesized and 30 natural genotypes, we assessed possible changes in gene ratio, diversity and functional groups during the evolution and domestication of this species. This comparison revealed that gene ratio and diversity between the two subgenomes have hardly changed. However, large numbers of genes have been lost and many new genes gained. Compared with the artificial genotypes, the natural ones contain much lower proportions of genes conferring resistance and tolerance to biotic and abiotic stresses but much higher proportions of genes associated with seeds development and metabolic processes. The diploid donor for the A subgenome of B. napus contributed more genes involved in agronomic traits and the C subgenome donor contributed more genes related to cellular development and metabolic process. Conclusions: Our results show that genes conditioning resistance and tolerance to both biotic and abiotic stresses have suffered stronger selection during the evolution and domestication of B. napus, and that changes in different aspects including gene content and genome size in the allotetraploid are not random but dictated by its two diploid donors.

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