| 磷胁迫下不同基因型大豆苗期根系形态及生物量差异的研究 |
| |
| 引用本文： | 王 聪,刘玉平,李秀辉,成晓东,李志刚.磷胁迫下不同基因型大豆苗期根系形态及生物量差异的研究[J].中国农学通报,2005,21(2):155-155. |
| |
| 作者姓名： | 王 聪 刘玉平 李秀辉 成晓东 李志刚 |
| |
| 作者单位： | (1内蒙古民族大学农学院，内蒙古通辽 028042；2内蒙古赤峰市松山区) |
| |
| 摘 要： | 在磷胁迫0mmol/L(P)，砂培]条件下，对不同基因型大豆苗期在根系形态、生物量等方面的差异进行了研究，结果表明：磷高效基因型在两叶期并未发挥出其基因型潜力的优势；四叶期，磷高效基因型的侧根数、侧根长、根系吸收面积、茎叶干重等性状的受抑制程度均显著低于磷中、低效基因型，而地下干重、根冠比却受到了较中、低效基因型更强的诱导作用。综合评价表明，磷高效基因型的综合值（评价磷效率特性的综合指标）显著高于磷中、低效基因型，显示出了较强的抗磷胁迫能力，但磷高效基因型并非所有性状都表现突出；四叶期可作为大豆耐低磷胁迫的筛选期，根表面积和活跃吸收面积可作为衡量磷效率特性的特异性指标。
|
| 关 键 词： | 磷胁迫 大豆 根系形态 生物量 基因型差异 |
Study on Variation in Characteristics of Phosphorus Efficiency among Different Soybean Genotypes at Seedling Stage under Phosphorus Stress |
| |
| Wang Cong,Liu Yuping,Li Xiuhui,Cheng Xiaodong,Li Zhigang.Study on Variation in Characteristics of Phosphorus Efficiency among Different Soybean Genotypes at Seedling Stage under Phosphorus Stress[J].Chinese Agricultural Science Bulletin,2005,21(2):155-155. |
| |
| Authors: | Wang Cong Liu Yuping Li Xiuhui Cheng Xiaodong Li Zhigang |
| |
| Institution: | (1Agricaltural College, Inner Mongolia University for Nationalities, Tongliao Inner Mongolia 028042; 2Shongshan District, Chifeng City, Inner Mongolia) |
| |
| Abstract: | Under the condition 0mmol/L(P),raise in vermiculite] of phosphorus stress, variation in root morphology and biomass among different soybean genotypes at seedling stage were studied, the result shows: At two-leaf age, higher P-efficiency genotypes(K1 and K2) don’t develop their potential advantages; at four-leaf age, some characteristics of K1 and K2, such as lateral root number, lateral root length, root absorbent area and dry weight of shoot are all less reduced than those of intermediate P-efficiency genotypes(Z1 and Z2) and of lower P-efficiency genotypes(M1 and M2), and dry weight of root and R/S of higher P-efficiency genotypes are more increased than those of the others. The comprehensive evaluation indicates that comprehensive value (comprehensive index of evaluating characteristics of P-efficiency) of K1 and K2 are both larger significantly than those of Z1 and Z2 and of M1 and M2, it shows that K1 and K2 have stronger capability of tolerance to P deficiency than the other genotypes. But it is not true that all characteristics of higher P-efficiency genotypes have an advantage over intermediate P-efficiency and lower P-efficiency genotypes; root surface area and active absorption area can be used to evaluate characteristics of P efficiency, and four-leaf age is the right age to screen soybean genotypes with tolerance to P deficiency. |
| |
| Keywords: | Phosphorus stresszz Soybeanzz Root morphologyzz Biomasszz Genotypic variationzz |
|
| 点击此处可从《中国农学通报》浏览原始摘要信息 |
| 点击此处可从《中国农学通报》下载免费的PDF全文 |
|
