外源香豆酸促进番茄幼苗地上部生长。 （注：原文中“L.”应该是“番茄（Lycopersicon esculentum）”之类的简称，这里根据语境补充完整，使译文更合理通顺）
Exogenous -Coumaric Acid Improves L. Seedling Shoot Growth.
作者信息
Nkomo Mbukeni, Gokul Arun, Keyster Marshall, Klein Ashwil
机构信息
Plant Omics Laboratory, Department of Biotechnology, University of the Western Cape, Bellville 7535, South Africa.
Environmental Biotechnology Laboratory, Department of Biotechnology, University of the Western Cape, Bellville 7535, South Africa.
出版信息
Plants (Basel). 2019 Nov 26;8(12):546. doi: 10.3390/plants8120546.
-Coumaric acid (-CA) belongs to a family of natural esters of hydroxycinnamic acid compounds that have been shown to modulate plant growth and metabolism. In this study, we investigated the effect of exogenous -CA on plant growth, reactive oxygen species (ROS)-induced oxidative damage, photosynthetic metabolism, osmolyte content and changes in superoxide dismutase (SOD) enzymatic activity. Exogenous -CA improved (chia) growth by significantly enhancing shoot length, fresh and dry weights coupled with augmented levels of total chlorophyll and carotenoid contents. Furthermore, -CA also triggered an induction in proline, glycine betaine (GB) and superoxide (O) levels while no changes were observed for hydrogen peroxide (HO) and downstream malondialdehyde (MDA) content. Also, no change in SOD activity was observed in the -CA treatment relative to the control. Therefore, the results suggest that exogenous -CA improves chia seedling growth possibly via activation of a ROS-signalling pathway involving O under the control of proline accumulation.
香豆酸（-CA）属于羟基肉桂酸化合物的天然酯类家族，已被证明可调节植物生长和代谢。在本研究中，我们研究了外源 -CA 对植物生长、活性氧（ROS）诱导的氧化损伤、光合代谢、渗透溶质含量以及超氧化物歧化酶（SOD）酶活性变化的影响。外源 -CA 通过显著增加茎长、鲜重和干重以及提高总叶绿素和类胡萝卜素含量水平来促进（奇亚籽）生长。此外，-CA 还引发了脯氨酸、甘氨酸甜菜碱（GB）和超氧阴离子（O）水平的诱导，而过氧化氢（HO）和下游丙二醛（MDA）含量未观察到变化。同样，相对于对照，在 -CA 处理中未观察到 SOD 活性的变化。因此，结果表明外源 -CA 可能通过在脯氨酸积累的控制下激活涉及 O 的 ROS 信号通路来改善奇亚籽幼苗生长。
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