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| 1 | Analysis of the Lignin Contents and Related Enzymes Activities in Seed Coat Between Black-Seeded and Yellow-Seeded Rapes (Brassica napus L.)显示文摘One pair of near isonegic yellow/black seeded rape (Brassica napus L) were used as experimental materials to study the changes of lignin contents and enzymes activities of 4-coumarate: CoA ligase (4CL), Cinnamyl alcohol dehydrogenase (CAD) and ferulate 5-hydroxylase (F5H) in seedcoats during the stage of seed development. The variation analysis showed that the changes of lignin contents and enzyme activities of 4CL, CAD and F5H in seed coat had significant differences between black- and yellow-seeded rapes, and also between different development stages. The correlation analysis demonstrated that the lignin contents were positively correlative to the activities of all three enzymes investigated in the study, and the interactions between them in the seed coat of the two lines. For yellow-seeded rape, the correlation coefficient (0.7262018) of lignin content and the interaction between 4CL and F5H was significant, the lignin contents were highly positively correlative to the activities of CAD and F5H, the interaction between 4CL and CAD, and the interaction between CAD and F5H. For the black-seeded rape, only the lignin content was highly positively correlative to the activity of F5H (the correlation coefficient was 0.772949), the other correlation coefficients, i. e. lignin contents to 4CL, CAD activities, the interactions between the three enzymes were not significant although all the correlation coefficients were above 0.5000. The results suggested that 4CL, CAD and F5H regulated the biosynthesis of lignin in seedcoat of rapes, leading to the lignin contents in the seedcoats of the yellow-seeded rape much lower than that of the black-seeded line, and affecting the thickness of the developing seedcoats in rapes. Therefore, it was likely to change the seedcoat ratio by overexpressing or suppressing the activities of one of the enzymes, both of them or all of them. | RAN Xiu-zhi LIANG Ying LI Jia-na | 2005 | Agricultural Sciences in China2005，4，12： | 3 |
| 2 | 木质素相关合成酶在甘蓝型黄、黑籽油菜中的表达差异显示文摘以1对甘蓝型黄籽(L2)、黑籽(L1)油菜的近等基因系为材料,研究了木质素生物合成的部分关键酶4CL、F5H和CAD在黄、黑籽油菜的不同组织中的表达差异。结果表明:4CL、F5H和CAD在甘蓝型黄、黑籽油菜不同器官和组织中的表达存在差异,特别是在种子中。其中,在同一组织器官中,4CL的不同种皮颜色之间的甘蓝型油菜中的表达差异明显;F5H在甘蓝型黄、黑籽油菜中的花与在30 d种子中的表达差异明显;CAD在种子的不同发育期中的表达差异明显。因此,这几种酶在甘蓝型黄、黑籽油菜种子中的表达差异,特别是在甘蓝型黄籽油菜的30 d种子中的表达都明显低于相应的黑籽油菜,说明这些酶的转录水平是导致木质素在甘蓝型黄、黑籽油菜之间存在表达差异的主要原因之一,也可能是形成甘蓝型黄、黑籽油菜皮壳差异的重要原因之一。 | 冉秀芝 雷波 梁颖 李加纳 李波 柴友荣 | 2012 | 重庆理工大学学报(自然科学)2012，26，6： | 1 |
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