不同供氮水平对叶菜型甘薯生理指标及叶绿体结构的影响  

Effects of nitrogen in physiological and chloroplast characteristics of vegetable sweet potato

作　　者：任丽花[1,2] 余华[1,2] 罗土炎[1,2] 黄敏敏[1,2] 蔡南通[3] 邱永祥[3] 

机构地区：[1]福建省农业科学院中心实验室,福建福州350013 [2]福建省精密仪器农业测试重点实验室,福建福州350003 [3]福建省农业科学院作物研究所,福建福州350013

出　　处：《福建农业学报》2011年第3期360-364,共5页Fujian Journal of Agricultural Sciences

基　　金：福建省青年科技人才创新项目(2008F3022);国家甘薯产业技术体系建设项目(nycytx-16-B-12)

摘　　要：采用盆栽试验,设置6个氮素水平:每盆施尿素0(N0)、2.1(N1)、4.2(N2)、6.3(N3)、8.4(N4)、10.5(N5)g,研究不同氮素供应水平下福薯7-6叶片游离脯氨酸、可溶性蛋白质、相对质膜透性以及叶绿体超微结构的变化特征,探讨叶菜用甘薯对不同氮肥用量的响应。结果表明:氮肥使用不足以及施用过量均会导致福薯7-6叶片游离脯氨酸含量增加,可溶性蛋白质含量下降、质膜选择透性增大,叶绿体膨胀变形、双层膜模糊、基粒类囊体排列不规则。在本试验条件下,氮肥不足及施用过量均会对福薯7-6叶片产生胁迫,造成福薯7-6叶片的早衰及细胞膜透性的增加,同时对叶绿体超微结构造成伤害。Effects of nitrogen applied for pot-culturing of Fushu7-6 was studied in the concentration of free proline and soluble protein, membrane permeability, chloroplast ultrastructure in leaves. Six nitrogen dosages were conducted as 0, 2.1, 4.2, 6.3, 8.4 and 10.5 g·pot^-1, respectively. The data showed that increasing in free proline content, decreasing in soluble protein content and high membrane permeability were resulted by either deficiency or extra nitrogen applied, the phenomenon in swelling of chloroplast and irregular granum thylakoid were observed. The results suggest that proper nitrogen dosage applied to Fushu7-6 is important to keep leaves from the stress of increasing membrane permeability and damaging chloroplast ultrastructure.

关 键 词：叶菜型甘薯 生理指标 叶绿体 氮 

分 类 号：S531[农业科学—作物学]