植物生态学报 ›› 2007, Vol. 31 ›› Issue (4): 720-728.DOI: 10.17521/cjpe.2007.0092
张智猛1(), 戴良香1, 胡昌浩2, 董树亭2, 王空军2, 宁堂原2
收稿日期:
2005-08-22
接受日期:
2006-09-30
出版日期:
2007-08-22
发布日期:
2007-07-30
作者简介:
E-mail: zmengzhang@sohu.com
基金资助:
ZHANG Zhi-Meng1(), DAI Liang-Xiang1, HU Chang-Hao2, DONG Shu-Ting2, WANG Kong-Jun2, NING Tang-Yuan2
Received:
2005-08-22
Accepted:
2006-09-30
Online:
2007-08-22
Published:
2007-07-30
摘要:
蛋白质作为氮素代谢的终极产物,与玉米(Zea mays)籽粒品质呈正相关关系,其生物合成主要在硝酸还原酶(NRase)、谷氨酰胺合成酶(GS)、谷氨酸脱氢酶(GDH)等一系列酶催化下完成,受制于品种自身遗传特性及环境因素,栽培管理措施和生态环境条件对玉米品质具有十分重要的影响。关于土壤水分供应状况对玉米籽粒主要品质成分的分布、积累动态和相关酶活性的影响的研究尚少见报道。以两种不同类型玉米:普通玉米‘掖单22’和高油玉米‘高油115’为研究对象,采用防雨棚池栽试验。水分处理以开花期为界线,设置3种水分处理,花后不浇水(W0)、花后浇1水(灌浆期,W1)、花后浇3水(灌浆期、乳熟期、蜡熟期,W2)。结果表明:两种类型玉米籽粒蛋白质及其组分含量的积累动态基本一致,且不受土壤水分供应状况的影响。玉米籽粒蛋白质及清蛋白、谷蛋白含量,均为‘高油115’较高,球蛋白含量为‘掖单22’较高,醇溶蛋白两类型玉米含量相近。在不同水分供应条件下,两种类型玉米叶片中NRase、GS酶活性和籽粒中GS、GDH酶活性的变化动态一致,NRase酶活性自灌浆初期至成熟期一直下降,GS、GDH酶活性呈单峰曲线,在授粉后20~40 d达到高峰,充足的水分供应有利于酶的活性维持较高水平;玉米叶片中NRase酶活性,‘掖单22’高于‘高油115’,叶片GS和籽粒GDH酶活性显著低于‘高油115’。研究表明:用玉米叶片中NRase和GS活性的高低表征籽粒蛋白质含量的高低不确切,土壤水分条件与不同类型玉米穗位叶和籽粒中GS 和GDH活性关系密切。
张智猛, 戴良香, 胡昌浩, 董树亭, 王空军, 宁堂原. 灌浆期不同水分处理对玉米籽粒蛋白质及其组分和相关酶活性的影响. 植物生态学报, 2007, 31(4): 720-728. DOI: 10.17521/cjpe.2007.0092
ZHANG Zhi-Meng, DAI Liang-Xiang, HU Chang-Hao, DONG Shu-Ting, WANG Kong-Jun, NING Tang-Yuan. EFFECT OF WATER ON PROTEIN, PROTEIN COMPOSITION AND RELATED ENZYME ACTIVITY IN DIFFERENT TYPES OF MAIZE. Chinese Journal of Plant Ecology, 2007, 31(4): 720-728. DOI: 10.17521/cjpe.2007.0092
品种 Variety | 水分处理 Water treatment | 穗粒数 No.of kernel per ear | 千粒重 Wt.of 1 000 kernels(g) | 穗粒重 Wt.per ear (g) | 产量 Yield (kg·hm-2) |
---|---|---|---|---|---|
‘掖单22’ | W2 | 448.00a | 362.76a | 159.50a | 9 130.09a |
Yedan22 | W1 | 414.00b | 350.80b | 150.00b | 8 815.26b |
W0 | 398.40c | 317.02c | 123.00c | 6 869.03c | |
‘高油115’ | W2 | 468.48a | 292.54a | 139.00a | 7 956.63a |
Gaoyou115 | W1 | 401.28b | 267.52b | 127.20b | 7 269.72b |
W0 | 404.46c | 233.40c | 106.90c | 5 924.54c |
表1 不同水分处理对两种类型玉米籽粒产量及构成因素的影响
Table 1
品种 Variety | 水分处理 Water treatment | 穗粒数 No.of kernel per ear | 千粒重 Wt.of 1 000 kernels(g) | 穗粒重 Wt.per ear (g) | 产量 Yield (kg·hm-2) |
---|---|---|---|---|---|
‘掖单22’ | W2 | 448.00a | 362.76a | 159.50a | 9 130.09a |
Yedan22 | W1 | 414.00b | 350.80b | 150.00b | 8 815.26b |
W0 | 398.40c | 317.02c | 123.00c | 6 869.03c | |
‘高油115’ | W2 | 468.48a | 292.54a | 139.00a | 7 956.63a |
Gaoyou115 | W1 | 401.28b | 267.52b | 127.20b | 7 269.72b |
W0 | 404.46c | 233.40c | 106.90c | 5 924.54c |
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