Rice(Oryza sativa L.)is an important staple food crop worldwide due to its adaptability to different environmental conditions.Because of its great economic and social importance,there is a constant requirement for new...Rice(Oryza sativa L.)is an important staple food crop worldwide due to its adaptability to different environmental conditions.Because of its great economic and social importance,there is a constant requirement for new varieties with improved agronomic characteristics,such as tolerance to different biotic(such as bacterium,fungus,insect and virus)and abiotic stresses(such as salinity,drought and temperature),higher yield and better organoleptic and nutritional value.Among the new genome editing technologies,the clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein(Cas)(CRISPR/Cas)system allows precise and specific edition in a targeted genome region.It is one of the most frequently used techniques for the study of the function of new genes and for the development of mutant lines with enhanced tolerance to biotic and abiotic stresses,herbicide resistance or improved yield.The wide varieties of applications for this technology include simple non-homologous end joining,homologous recombination,gene replacement,and base editing.In this review,we analyzed how some of these applications have been used in rice cultivars to obtain rice varieties better adapted to current environmental conditions and market requirements.展开更多
为了解氮肥和钙肥对烤烟(Nicotiana tabacum)生长的影响,对成熟期烤烟的根系形态、生理代谢指标和产量进行了研究。结果表明,与施0.12 g kg^(–1)氮相比,施0.20 g kg–1氮的烤烟根系最长侧根长、根系体积、根干重、叶干重和可溶性蛋白...为了解氮肥和钙肥对烤烟(Nicotiana tabacum)生长的影响,对成熟期烤烟的根系形态、生理代谢指标和产量进行了研究。结果表明,与施0.12 g kg^(–1)氮相比,施0.20 g kg–1氮的烤烟根系最长侧根长、根系体积、根干重、叶干重和可溶性蛋白质含量均极显著升高,MDA含量极显著下降,SOD活性显著下降,但对侧根数、CAT活性和O_2~的影响均不显著。施钙0.40 g kg^(–1),根系体积、侧根数、CAT和SOD活性以及可溶性蛋白质含量均比对照提高,MDA含量和O_2~则降低;施钙1.00 g kg–1,最长侧根长、根干重和叶干重均提高。氮×钙互作对烤烟的最长侧根长、根系体积、根干重、叶干重和生理代谢指标的影响均极显著,但对侧根数的影响不显著。因此,施0.20 g kg–1氮和0.40 g kg^(–1)钙能最大限度地改善烤烟根系形态、生理状况及提高产量。展开更多
文摘Rice(Oryza sativa L.)is an important staple food crop worldwide due to its adaptability to different environmental conditions.Because of its great economic and social importance,there is a constant requirement for new varieties with improved agronomic characteristics,such as tolerance to different biotic(such as bacterium,fungus,insect and virus)and abiotic stresses(such as salinity,drought and temperature),higher yield and better organoleptic and nutritional value.Among the new genome editing technologies,the clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein(Cas)(CRISPR/Cas)system allows precise and specific edition in a targeted genome region.It is one of the most frequently used techniques for the study of the function of new genes and for the development of mutant lines with enhanced tolerance to biotic and abiotic stresses,herbicide resistance or improved yield.The wide varieties of applications for this technology include simple non-homologous end joining,homologous recombination,gene replacement,and base editing.In this review,we analyzed how some of these applications have been used in rice cultivars to obtain rice varieties better adapted to current environmental conditions and market requirements.
文摘为了解氮肥和钙肥对烤烟(Nicotiana tabacum)生长的影响,对成熟期烤烟的根系形态、生理代谢指标和产量进行了研究。结果表明,与施0.12 g kg^(–1)氮相比,施0.20 g kg–1氮的烤烟根系最长侧根长、根系体积、根干重、叶干重和可溶性蛋白质含量均极显著升高,MDA含量极显著下降,SOD活性显著下降,但对侧根数、CAT活性和O_2~的影响均不显著。施钙0.40 g kg^(–1),根系体积、侧根数、CAT和SOD活性以及可溶性蛋白质含量均比对照提高,MDA含量和O_2~则降低;施钙1.00 g kg–1,最长侧根长、根干重和叶干重均提高。氮×钙互作对烤烟的最长侧根长、根系体积、根干重、叶干重和生理代谢指标的影响均极显著,但对侧根数的影响不显著。因此,施0.20 g kg–1氮和0.40 g kg^(–1)钙能最大限度地改善烤烟根系形态、生理状况及提高产量。
