Allelopathic Effects of Cinnamomum migao on Seed Germination and Seedling Growth of its Associated Species Liquidambar formosana
Allelopathic Effects of Cinnamomum migao on Seed Germination and Seedling Growth of its Associated Species Liquidambar formosana
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米高香对其近缘种枫香种子萌发及幼苗生长的化感作用
DOI：
10.3390/f10070535
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发表时间：
2019-06
期刊：
影响因子：
2.9
通讯作者：
Liu Jiming
中科院分区：
文献类型：
--
作者：
Wang Deng;Chen Jingzhong;Xiong Xue;Wang Shu;Liu Jiming
本研究探讨了密高樟对其近缘种枫香的化感作用及其机制。我们评估了C.不同浓度的米告果皮、叶片和根际土壤对甘草种子萌发、幼苗生长和生理的影响。福尔摩沙。所有提取物对L.在高浓度（50 mg mL−1）时，对台湾相思种子萌发具有明显的抑制作用。所有提取物都促进了幼苗的高度和地径，其中浓度为1 mg mL−1的叶水提取物和浓度为5 mg mL−1的果皮和根际土壤水提取物的促进作用最大。所有提取物均促进了L.福尔摩沙幼苗，与水果皮提取物达到最高的积累。叶片水提液促进可溶性淀粉积累。浓度>10 mg mL−1的果皮水提取物显著增加可溶性糖含量。浓度>5 mg mL−1的叶和根际土壤水提取物增加了脯氨酸的积累。浓度>1 mg mL−1的所有提取物均显著增加丙二醛含量。水果皮和根际土壤提取物在浓度分别为10和0.5毫克mL-1，促进超氧化物歧化酶活性。当果皮和叶片浸提液浓度超过5 mg mL−1时，土壤脲酶、多酚氧化酶和过氧化氢酶活性显著增加;当所有浸提液浓度均为5 mg mL−1时，土壤酸性磷酸酶活性显著增加。综合化感指数表明，低、中浓度浸提液均表现出促进作用，高浓度浸提液表现出明显的抑制作用，且叶水浸提液的综合效应值高于果皮和根际土壤。因此，化感作用可以影响到C。migao和L.福尔摩沙。
We examined allelopathic effects and underlying mechanisms of Cinnamomum migao on its associated species Liquidambar formosana. We assessed effects of aqueous extracts of C. migao pericarp, leaf, and rhizosphere soil at different concentrations on seed germination, seedling growth, and physiology of L. formosana. All extracts inhibited L. formosana seed germination, with obvious inhibition at high concentrations (50 mg mL−1). All extracts promoted the height and ground diameter of seedlings, with the highest promotion achieved with aqueous leaf extract at a concentration of 1 mg mL−1 and aqueous pericarp and rhizosphere soil extracts at a concentration of 5 mg mL−1. All extracts promoted soluble protein accumulation in L. formosana seedlings, with the highest accumulation achieved with aqueous pericarp extracts. Aqueous leaf extract promoted soluble starch accumulation. Aqueous pericarp extract at concentrations of >10 mg mL−1 significantly increased soluble sugar content. Aqueous leaf and rhizosphere soil extracts at concentrations of >5 mg mL−1 increased proline accumulation. All extracts at concentrations of >1 mg mL−1 significantly increased malondialdehyde content. Aqueous pericarp and rhizosphere soil extracts at concentrations of 10 and 0.5 mg mL−1, respectively, promoted superoxide dismutase activity. Activities of soil urease, polyphenol oxidase, and catalase were significantly increased when the concentration of aqueous pericarp and leaf extracts exceeded 5 mg mL−1, and the activity of soil acid phosphatase significantly increased when the concentration of all extracts were 5 mg mL−1. According to the synthetic allelopathic index, the low- and medium-concentration extracts all showed a promoting effect, whereas high concentrations exhibited obvious inhibitory effects; furthermore, the comprehensive effect value of leaf water extraction was higher than that of the pericarp and rhizosphere soil. Thus, allelopathy can affect the long-term co-existence of C. migao and L. formosana.
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