The HyPRP gene EARLI1 has an auxiliary role for germinability and early seedling development under low temperature and salt stress conditions in Arabidopsis thaliana

Planta ◽  
2011 ◽  
Vol 234 (3) ◽  
pp. 565-577 ◽  
Author(s):  
Dan Xu ◽  
Xuan Huang ◽  
Zi-Qin Xu ◽  
Michael Schläppi
Keyword(s):  
Arabidopsis Thaliana ◽  
Salt Stress ◽  
Low Temperature ◽  
Seedling Development ◽  
Stress Conditions ◽  
Early Seedling ◽  
Early Seedling Development ◽  
Auxiliary Role

scholarly journals Zinc Seed Priming Improves Spinach Germination at Low Temperature

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 271
Author(s):  
Muhammad Imran ◽  
Asim Mahmood ◽  
Günter Neumann ◽  
Birte Boelt
Keyword(s):  
Low Temperature ◽  
Temperature Stress ◽  
Multispectral Imaging ◽  
Germination Rate ◽  
Cost Effective ◽  
Seed Priming ◽  
Seedling Development ◽  
Low Temperature Stress ◽  
Early Seedling ◽  
Early Seedling Development

Low temperature during germination hinders germination speed and early seedling development. Zn seed priming is a useful and cost-effective tool to improve germination rate and resistance to low temperature stress during germination and early seedling development. Spinach was tested to improve germination and seedling development with Zn seed priming under low temperature stress conditions. Zn priming increased seed Zn concentration up to 48 times. The multispectral imaging technique with VideometerLab was used as a non-destructive method to differentiate unprimed, water- and Zn-primed spinach seeds successfully. Localization of Zn in the seeds was studied using the 1,5-diphenyl thiocarbazone (DTZ) dying technique. Active translocation of primed Zn in the roots of young seedlings was detected with laser confocal microscopy. Zn priming of spinach seeds at 6 mM Zn showed a significant increase in germination rate and total germination under low temperature at 8 °C.

Mitochondrial structures during seed germination and early seedling development in Arabidopsis thaliana

Biologia ◽  
2015 ◽  
Vol 70 (8) ◽  
Author(s):  
José L. Rodríguez ◽  
Juana G. De Diego ◽  
Francisco D. Rodríguez ◽  
Emilio Cervantes
Keyword(s):  
Arabidopsis Thaliana ◽  
Seed Germination ◽  
Fluorescent Protein ◽  
Root Apex ◽  
Cell Types ◽  
Seedling Development ◽  
Mitochondrial Morphology ◽  
Early Seedling ◽  
Green Fluorescent ◽  
Early Seedling Development

AbstractMitochondrial morphology and evolution have been observed during seed germination and early seedling development in Arabidopsis thaliana line 43a9 (ecotype Columbia) expressing green fluorescent protein in these organelles. Fluorescence, confocal and electronic microscopy images reveal that mitochondrial development goes through different stages, and that the organelle structure varies with cell types during these processes. Mitochondria develop from larger, isodiametric structures pre-existent in the dry seed called promitochondria. After germination, variations in mitochondrial morphology occur synchronously with cell differentiation and cell division in the course of early root development. Some promitochondria develop into intermediate structures resembling the syncytial organelles. These structures have been described in certain plants under hypoxia as intermediates for the formation of mature mitochondria. On the other hand, other promitochondria temporarily remain in the cells of the root apex

scholarly journals Involvement of type-f thioredoxins during germination and early seedling development and in response to oxidative stress in Arabidopsis thaliana

Botany ◽  
2018 ◽  
Vol 96 (7) ◽  
pp. 471-484
Author(s):  
Abdelmadjid Djoumad ◽  
Solange Villette ◽  
Iauhenia Isayenka ◽  
Nathalie Beaudoin
Keyword(s):  
Oxidative Stress ◽  
Arabidopsis Thaliana ◽  
Seed Germination ◽  
Seedling Development ◽  
Biotic Stresses ◽  
Cellular Environment ◽  
Early Seedling ◽  
Response To Stress ◽  
Uv C ◽  
Early Seedling Development

Thioredoxins (TRXs) are important components of redox-regulated systems involved in maintaining and regulating the cellular redox environment during growth and development and in response to abiotic and biotic stresses. Plants possess several types of TRX localized in various compartments, including five different types of chloroplastic TRXs. Arabidopsis thaliana contains two chloroplastic type-f TRXs, TRX f1 and TRX f2, involved in the regulation of light-dependent activation of photosynthesis and carbon metabolism. However, little is known about their role during development and in response to stress. We used single and double mutants of TRX f1 and TRX f2 to assess their roles during seed germination and seedling development. Loss of both TRX f1 and TRX f2 induced faster germination and seedling development associated with reduced sensitivity to abscisic acid. This suggests that type-f TRXs negatively regulate seed germination and seedling development. Moreover, double-mutant seedlings were more sensitive to methyl viologen and UV-C irradiation than the wild-type seedlings, indicating that loss of type-f TRXs increases sensitivity to oxidative stress. Overall, these results indicate that type-f TRXs contribute to maintaining an adequate cellular environment required for a tight regulation of germination and a better tolerance to oxidative stress.

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