【摘要】 研究比较了自然状态下开花与未开花小琴丝竹叶片的性状。结果表明:开花小琴丝竹与未开花小琴丝竹相比,游离脯氨酸和丙二醛(MDA)含量分别升高了10.3%和9.5%,可溶性蛋白、可溶性糖含量分别下降了15.3%和19.2%,超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性分别下降了37.2%、46.2%和0.4%;叶绿素a含量下降了52.7%,叶绿素b含量下降了75.5%;叶片的质膜相对透性(RPMP)和水分饱和亏缺(WSD)升高了836.8%和92.3%,组织相对含水量(RWC)下降了12.2%;叶片保水力(失水率)低于未开花竹子,开花小琴丝竹离体叶片经24 h失水率达100%,而未开花小琴丝竹叶片失水率同样达到100%的时间只要14.5 h。更多还原

【Abstract】 The leaf characteristics of flowering and non-flowering Bambusa multiplex‘Alphonse-Karr’were studied. The results showed that in the flowering leaves,the free proline and MDA content increased respectively by 10. 3% and 9. 5%,and the soluble protein and soluble sugar content decreased by 15. 3% and 19. 2%. Meanwhile,the superoxide dismutase( SOD),peroxidase( POD) and catalase( CAT) activities decreased respectively by37. 2%,46. 2% and 0. 4%,the chlorophyll a and chlorophyll b content decreased respectively by 52. 7% and 75. 5%,the relative permeability of plasma membrane( RPMP) and water saturation deficit( WSD) increased respectively by 836. 8% and 92. 3%,the tissue relative water content( RWC) decreased by 12. 2%. The water holding capacity( loss rate) of the isolated flowering leaves was lower than that of the non-flowering. The water loss rate of the flowering leaves took 24 h to reach 100%,while the no-flowering leaves needed only 14. 5 h.更多还原