UV-C辐射玉米种子对叶片保护酶活性及叶表皮形态的影响
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摘要
以嫩单18玉米种子为实验材料,研究了不同时间的UV-C辐射对玉米叶片中保护酶活性和叶表皮特征的影响。结果显示:SOD、POD和CAT的活性变化趋势相似,即随辐射时间增加活性降低,辐射4h或6h时降到最低,之后有所上升,但是都低于对照组。UV-C辐射能缩小气孔的长、保卫细胞宽、表皮长细胞的长度和长细胞宽度;而叶长、叶宽和根条数明显增加(p<0.05),表明玉米在受到UV-C辐射时可通过增加叶面积和根条数来缓解辐射带来的伤害。
In this experiment,the effect of UV-C radiation on the Nendan 18 corn seeds and protective enzyme activity and leaf epidermis morphology of seedlings were studied.The results showed that the trends of the activity about SOD,POD and CAT were similar.That was,with the increase of radiation time,the activity decreased to the minimum at 4 hor 6 h,and then increased.But they were all lower than that of the control group.UV-C radiation could reduce the length of stoma,the width of guard cells,the length of epidermal long cells and the width of long cells.Leaf length,leaf width and root number increased significantly(p<0.05),it showed that corn could reduce the damage of UV-C radiation by increasing leaf area and root number.
In this experiment,the effect of UV-C radiation on the Nendan 18 corn seeds and protective enzyme activity and leaf epidermis morphology of seedlings were studied.The results showed that the trends of the activity about SOD,POD and CAT were similar.That was,with the increase of radiation time,the activity decreased to the minimum at 4 hor 6 h,and then increased.But they were all lower than that of the control group.UV-C radiation could reduce the length of stoma,the width of guard cells,the length of epidermal long cells and the width of long cells.Leaf length,leaf width and root number increased significantly(p<0.05),it showed that corn could reduce the damage of UV-C radiation by increasing leaf area and root number.
引文
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[2]陈坤,朱涛,娄元伟,等.紫外线UV-B增强对植物影响的研究进展[J].信阳师范学院学报(自然科学版),2004,17(3):359-366,372.
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[4]任伟,郝利平.UV-C处理对贡橘冷害的影响[J].核农学报,2016,30(6):1 111-1 116.
[5]Choi S,Jun H,Bang J,et al.Behaviour of Aspergillus flavus and Fusarium graminearum on rice as affected by degree of milling,temperature,and relative humidity during storage.Food Microbiol,2015,46:307-313.
[6]Guerrero-Beltran JA,Barbosa-Canovas GV Review:advantages and limitations on processing foods by UV light.Food Sci Technol Int,2004,10:137-147.
[7]Pinheiro J,Alegria C,Abreu M,et al.Use of UV-C postharvest treatment for extending fresh whole tomato(Solanum lycopersicum,cv.Zinac)shelf-life.J Food Sci Technol,2015,52:5 066-5 074.
[8]杨晓杰,李旭业,王海艳,等.玉米自交系耐盐种质的筛选及耐盐性评价[J].玉米科学,2014,22(4):19-25.
[9]苏占胜,王连喜,李福生,等.UV-B增加对玉米光合作用日变化的影响[J].宁夏工程技术,2006,5(3):284-287.
[10]王传海,何都良,郑友飞,等.连续两年紫外线-B辐射增强对玉米种子发芽及幼苗生长的影响[J].农村生态环境,2003,19(3):23-25.
[11]罗南书,钟章成.田间增加UV-B辐射对玉米光合生理的影响[J].生态学杂志,2006,25(4):369-373.
[12]吴江.吉林地区甜玉米种子低温发芽临界温度的研究[J].种子,2018,37(3):96-97.
[13]程尚明,旷宗琴,卢绍华,等.杂交玉米新品种禾睦玉102的选育及配套技术[J].种子,2018,37(4):109-111.
[14]张志良,李小方.植物生理学实验指导[M].北京:高等教育出版社,2016:58-228.
[15]姜智超,王作日,徐莹,等.UV-C辐射对玉米种子萌发及幼苗生长的影响[J].分子植物育种,2018,16(10):3 312-3 316.