The improvement of grain quality in aromatic rice is very important for farmer to increase their income.Present study was conducted with a two-year field experiment and three aromatic rice cultivars in order to study ...The improvement of grain quality in aromatic rice is very important for farmer to increase their income.Present study was conducted with a two-year field experiment and three aromatic rice cultivars in order to study the effects of exogenousα-ketoglutaric acid on yield formation,grain quality characters and the biosynthesis of 2-acetyl-1-pyrroline(2-AP,key component of aromatic rice’s fragrance)in aromatic rice.At heading stage,0.50 mmol L^(-1)(T1)and 1.00 mmol L^(-1)(T2)α-ketoglutaric acid solutions were overhead sprinkle to aromatic rice plants,respectively while the treatment which was overhead sprinkled with distilled water was set as control(CK).The results showed that 17.34%-33.04%and 21.39%-34.74%higher grain 2-AP contents were recorded in T1 and T2 treatments,respectively.Compared with CK,T1 and T2 treatments significantly reduced the transcript level of gene BADH2 which is related to the 2-AP biosynthesis in aromatic rice.3.86%-7.51%higher grain protein contents and 1.15%-3.37%higher head rice rates were also recorded inα-ketoglutaric acid treatments than CK.Moreover,T1 and T2 treatments remarkably decreased the chalky rice rate,chalkiness and grain amylose content.However,there was no remarkable difference in grain yield and related trails(effective panicle number,grain number per panicle,seed-setting rate and 1000-grain weight)among CK,T1 and T2 treatments.In conclusion,application of exogenousα-ketoglutaric acid enhanced 2-AP biosynthesis and improved grain quality of aromatic rice.展开更多
基金This work is supported by Hubei special fund for agricultural science and technology innovation(2018skjcx01)the Engineering Research Center of Ecology and Agricultural Use ofWetland,Ministry of Education(KFT201904).
文摘The improvement of grain quality in aromatic rice is very important for farmer to increase their income.Present study was conducted with a two-year field experiment and three aromatic rice cultivars in order to study the effects of exogenousα-ketoglutaric acid on yield formation,grain quality characters and the biosynthesis of 2-acetyl-1-pyrroline(2-AP,key component of aromatic rice’s fragrance)in aromatic rice.At heading stage,0.50 mmol L^(-1)(T1)and 1.00 mmol L^(-1)(T2)α-ketoglutaric acid solutions were overhead sprinkle to aromatic rice plants,respectively while the treatment which was overhead sprinkled with distilled water was set as control(CK).The results showed that 17.34%-33.04%and 21.39%-34.74%higher grain 2-AP contents were recorded in T1 and T2 treatments,respectively.Compared with CK,T1 and T2 treatments significantly reduced the transcript level of gene BADH2 which is related to the 2-AP biosynthesis in aromatic rice.3.86%-7.51%higher grain protein contents and 1.15%-3.37%higher head rice rates were also recorded inα-ketoglutaric acid treatments than CK.Moreover,T1 and T2 treatments remarkably decreased the chalky rice rate,chalkiness and grain amylose content.However,there was no remarkable difference in grain yield and related trails(effective panicle number,grain number per panicle,seed-setting rate and 1000-grain weight)among CK,T1 and T2 treatments.In conclusion,application of exogenousα-ketoglutaric acid enhanced 2-AP biosynthesis and improved grain quality of aromatic rice.
基金supported by the National Natural Science Foundation of China(51871104,12204010,and 52272177)the Fundamental Research Funds for the Central Universities(2019kfy RCPY074)the Natural Science Foundation of Anhui Province(2008085QA27,2008085QA41)。
文摘二维过渡金属碳化物(MXene)具有高度亲水的表面和优异的金属导电性,在电化学储能领域具有竞争力.然而,层状结构的MXene极易自堆叠,因此降低了离子的可通过性和可用的传输路径,从而限制了其电化学性能.为了充分发挥MXene在电化学储能方面的优势,本文通过化学氧化方法将大尺寸MXene刻蚀成具有纳米级离子通道的MXene纳米片,制得的MXene电极在保留了大尺寸MXene纳米片优异机械强度和导电性的同时,可以有效缩短离子传输距离,提高整体电化学活性.在此基础上制造的自愈式MXene基锌离子微型电容器在2 mA cm^(-2)的电流密度下,表现出高面积比电容(532.8 mF cm^(-2))和低自放电率(4.4 mV h^(-1)),在2800μW cm^(-2)的功率密度下,能量密度高达145.1μWh cm^(-2)纳米级离子通道结构为构建高性能电化学储能电极提供了一种新策略,在电化学储能和柔性电子领域具有广阔的应用前景.
