摘要
To uncover the potential antioxidative role of anthocyanins in vivo in protecting photosynthetic tissues from photoinhibition, the effects of high irradiance [HI, 1300 μmol(photon) m−2 s−1] were studied using detached leaves derived from Arabidopsis wild-type (WT) and the mutant deficient in anthocyanin biosynthesis (tt3tt4). HI stress caused decreased chlorophyll content and photochemical efficiency, but increased cell-membrane leakage and contents of hydrogen peroxide and superoxide radical in the leaves of both Arabidopsis phenotypes, but the WT plants showed better HI tolerance than tt3tt4 mutant. HI caused a significant increase in the 1,1-diphenyl-2-picrylhydrazyl scavenging capacity in WT but not in the tt3tt4 mutant. The anthocyanins could not contribute substantially to light-shielding during the periods of HI stress, because the anthocyanin content in WT was very low and the colour of leaves was the same as in the tt3tt4 mutant. Thus, it was assumed that the better HI tolerance in WT was mostly related to the potential antioxidative role of anthocyanins.
摘要译文
揭开保护光合组织的光抑制体内花青素的抗氧化的潜在作用，高光[HI，1300的影响2 / SUP取值HI造成压力降低叶绿素含量，光化学效率，但增加细胞膜渗漏和过氧化氢和超氧自由基含量在两种拟南芥表型的叶子上，但野生植株表现出较好的耐受性HI比tt3tt4突变。 HI引起了1,1-二苯基-2-苦基苯肼清除能力中的WT一个显著增加，但不是在tt3tt4突变体。在HI紧张的时期花青素能不能在实质上促进遮光，因为在WT中的花青素含量很低，叶子的颜色是相同的，在tt3tt4突变体。因此，人们认为在WT中的更好的HI耐受大多与花色苷的潜在的抗氧化作用。
Q. Zhang [1] L. -J. Su [1] J. -W. Chen [2] X. -Q. Zeng [1] B. -Y. Sun [1] C. -L. Peng [1]. The antioxidative role of anthocyanins in Arabidopsis under high-irradiance[J]. Biologia Plantarum, 2012,56(1): 97-104