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首页> 美国卫生研究院文献>Scientific Reports >Effects of Composite LED Light on Root Growth and Antioxidant Capacity of Cunninghamia lanceolata Tissue Culture Seedlings
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Effects of Composite LED Light on Root Growth and Antioxidant Capacity of Cunninghamia lanceolata Tissue Culture Seedlings

机译：复合LED光对杉木组织培养幼苗根系生长和抗氧化能力的影响

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We used the 12th generation of the Cunninghamia (C.) lanceolata tissue culture seedlings, and white light emitting diode (LED) light as control (CK). We applied five composite LED light treatments, red-blue 4:1, 8:1 (4R1B and 8R1B), red-blue-purple 8:1:1 (8R1B1P), and red-blue-purple-green 6:1:1:1, 8:1:1:1 (6R1B1P1G and 8R1B1P1G), to study the effects of light quality on root growth characteristics and antioxidant capacity of C. lanceolata tissue culture seedlings. The results showed that: (1) rooting rate, average root number, root length, root surface area, and root activity were higher with 6R1B1P1G and 8R1B1P1G treatments compared to 4R1B, 8R1B, 8R1B1P and CK treatments; and the root growth parameters under the 8R1B1P1G treatment were as high as 95.50% for rooting rate, 4.63 per plant of the average number of root, 5.95 cm root length, 1.92 cm2 surface area, and 145.56 ng/(g·h) root activity, respectively. (2) The composite lights of 4R1B, 8R1B, 8R1B1P, 6R1B1P1G, and 8R1B1P1G are beneficial for the accumulation of soluble sugar content (SSC) and soluble protein content (SPC), but not conducive for the increase of free proline content (FPC); the plants under 6R1B1P1G and 8R1B1P1G treatments had higher superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX) activity and lower malondialdehyde (MDA), polyphenol oxidase (PPO) activity. (3) Redundancy analysis showed that POD activity positively correlated with root activity; SPC, SOD and CAT activities positively correlated with root growth parameters; while SSC, MDA content, APX and PPO activities negatively correlated with root growth parameters. These results suggest that the responses of root growth and antioxidant capacity of the C. lanceolata tissue culture seedlings to different light qualities vary. The relationship between root growth parameters and antioxidant capacity was closely related. Red-blue-purple-green was the most suitable composite light quality for root growth of C. lanceolata tissue culture seedlings, and 8:1:1:1 was the optimal ratio, under which the rooting rate, root activity and root growth of tissue culture seedlings peaked.
机译：我们使用第12代杉木（C. lanceolata）组织培养幼苗，并使用白色发光二极管（LED）灯作为对照（CK）。我们应用了五种复合LED照明处理：红蓝色4：1、8：1（4R1B和8R1B），红蓝色紫色8：1：1（8R1B1P）和红蓝色紫色绿色6：1： 1：1、8：1：1：1（6R1B1P1G和8R1B1P1G），以研究光照质量对轮叶杉木组织培养幼苗根系生长特性和抗氧化能力的影响。结果表明：（1）6R1B1P1G和8R1B1P1G处理的生根率，平均根数，根长，根表面积和根系活性均高于4R1B，8R1B，8R1B1P和CK处理； 8R1B1P1G处理的根系生长参数生根率高达95.50％，平均单株根数为4.63，根长为5.95 cm，表面积为1.92 cm 2 ，为145.56 ng /（g·h）根活动。 （2）4R1B，8R1B，8R1B1P，6R1B1P1G和8R1B1P1G的复合光有利于可溶性糖含量（SSC）和可溶性蛋白质含量（SPC）的积累，但不利于游离脯氨酸含量（FPC）的增加; 6R1B1P1G和8R1B1P1G处理的植物具有较高的超氧化物歧化酶（SOD），过氧化物酶（POD），过氧化氢酶（CAT），抗坏血酸过氧化物酶（APX）活性和较低的丙二醛（MDA），多酚氧化酶（PPO）活性。 （3）冗余分析表明POD活性与根系活性呈正相关； SPC，SOD和CAT活性与根系生长参数呈正相关； SSC，MDA含量，APX和PPO活性与根系生长参数呈负相关。这些结果表明，轮叶杉木组织培养苗的根系生长和抗氧化能力对不同光质的响应不同。根系生长参数与抗氧化能力之间的关系密切。红-蓝-紫-绿是轮叶蜡tissue组织培养幼苗最适合的根系复合光质，最佳比例为8：1：1：1，在此比例下，生根，生根活性和根系生长组织培养幼苗达到顶峰。

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