By adopting a phosphorescent host/guest system consisting of blue iridium complex as host and a series of phosphorescent dyes as guest, efficient and low-voltage monochromic organic light-emitting devices（OLEDs） wer...By adopting a phosphorescent host/guest system consisting of blue iridium complex as host and a series of phosphorescent dyes as guest, efficient and low-voltage monochromic organic light-emitting devices（OLEDs） were fabricated. The devices with blue iridium host have higher power efficiency than the device with the conventional host 4,4＇-N,N＇-dicarbazole-biphenyl. The enhancement of the maximum power efficiency in green phosphorescent device can reach 37.2%. Dichromatic white OLED could be achieved by simply adjusting the concentration of the orange dyes. At a brightness of 1000 cd/m2, the power efficiency of the white device is 8.4 lm/W with a color ren- dering index of 76.展开更多
Soybean is an important legume crop that displays the classic shade avoidance syndrome(SAS),including exaggerated stem elongation,which leads to lodging and yield reduction under density farming conditions.Here,we com...Soybean is an important legume crop that displays the classic shade avoidance syndrome(SAS),including exaggerated stem elongation,which leads to lodging and yield reduction under density farming conditions.Here,we compared the effects of two shade signals,low red light to far-red light ratio(R:FR)and low blue light(LBL),on soybean status and revealed that LBL predominantly induces excessive stem elongation.We used CRISPR-Cas9-engineered Gmcry mutants to investigate the functions of seven cryptochromes(GmCRYs)in soybean and found that the four GmCRY1s overlap in mediating LBL-induced SAS.Lightactivated GmCRY1s increase the abundance of the bZlP transcription factors STF1 and STF2,which directly upregulate the expression of genes encoding GA2 oxidases to deactivate GA1 and repress stem elongation.Notably,GmCRY1b overexpression lines displayed multiple agronomic advantages over the wild-type control under both dense planting and intercropping conditions.Our study demonstrates the integration of GmCRY1-mediated signals with the GA metabolic pathway in the regulation of LBL-induced SAS in soybean.It also provides a promising option for breeding lodging-resistant,high-yield soybean cultivars in the future.展开更多
基金Supported by the National Natural Science Foundation of China（Nos.61474054, 61475060, 61177026）
文摘By adopting a phosphorescent host/guest system consisting of blue iridium complex as host and a series of phosphorescent dyes as guest, efficient and low-voltage monochromic organic light-emitting devices（OLEDs） were fabricated. The devices with blue iridium host have higher power efficiency than the device with the conventional host 4,4＇-N,N＇-dicarbazole-biphenyl. The enhancement of the maximum power efficiency in green phosphorescent device can reach 37.2%. Dichromatic white OLED could be achieved by simply adjusting the concentration of the orange dyes. At a brightness of 1000 cd/m2, the power efficiency of the white device is 8.4 lm/W with a color ren- dering index of 76.
基金This work was partially supported by the National Key Research and Development Plan(2016YFDO100201)the National Transgenic Scienceand Technology Program(2016ZX08010-002)+2 种基金the National Natural Science Foundation of China(31422041,31871705)the Agricultural Scienceand Technology Innovation Program(ASTIP)of the Chinese Academy ofAgricultural Sciencesthe Central Public-Interest Scientific InstitutionBasal Research Fund.
文摘Soybean is an important legume crop that displays the classic shade avoidance syndrome(SAS),including exaggerated stem elongation,which leads to lodging and yield reduction under density farming conditions.Here,we compared the effects of two shade signals,low red light to far-red light ratio(R:FR)and low blue light(LBL),on soybean status and revealed that LBL predominantly induces excessive stem elongation.We used CRISPR-Cas9-engineered Gmcry mutants to investigate the functions of seven cryptochromes(GmCRYs)in soybean and found that the four GmCRY1s overlap in mediating LBL-induced SAS.Lightactivated GmCRY1s increase the abundance of the bZlP transcription factors STF1 and STF2,which directly upregulate the expression of genes encoding GA2 oxidases to deactivate GA1 and repress stem elongation.Notably,GmCRY1b overexpression lines displayed multiple agronomic advantages over the wild-type control under both dense planting and intercropping conditions.Our study demonstrates the integration of GmCRY1-mediated signals with the GA metabolic pathway in the regulation of LBL-induced SAS in soybean.It also provides a promising option for breeding lodging-resistant,high-yield soybean cultivars in the future.
