不同硬实程度的刺槐种子活力差异性研究  

Study on Vigor Difference of Seeds with Different Hard Degree in Robinia pseudoacacia

作　　者：曹帮华[1] 翟明普[2] 郭俊杰[1] 

机构地区：[1]山东农业大学林学院 [2]北京林业大学资源与环境学院,北京100083

出　　处：《林业科学》2005年第2期42-47,共6页Scientia Silvae Sinicae

基　　金：科技部项目 ( 0 2EFN2 1670 0 794);北京市重大项目 (H0 2 0 72 0 110 190 )资助

摘　　要：以始温 80℃水浸种 1～ 4d吸胀的刺槐种子视为不同硬实程度的种子T1 、T2 、T3及T4 ,与第 4天仍未吸胀的刺槐硬实种子 (记作Tr)为试材对其种子活力差异性进行研究。结果表明 :随着硬实程度的提高 ,即Tr>T4 >T3>T2 >T1 ,种子的发芽势、发芽指数、活力指数、呼吸速率呈上升趋势 ;而电导率呈下降趋势。通过测定人工逆境 (盐胁迫、低温、人工老化 )处理种子的SOD酶活性和MDA含量 ,发现硬实种子具有较高的抗逆性 ,且其抗逆性随硬实程度的增高而增强 ,进一步证实了硬实种子具有较高的活力水平。The vigor differences of black locust seeds with different hard degree were studied in this paper.The imbibition seeds soaked into 80 ℃ water and gradually cooled down for different days(1～4 d) were respectively called T 1,T 2, T 3 and T 4. The unimbibed seeds of the forth day were called hard seeds(T r) which would be soaked with concentrated sulphuric acid for 23 minutes in order to imbibe and germinate.The results showed that as the imbibing time getting long,hard degree of control seeds increasing gradually(T 4>T 3>T 2>T 1),the germinating,potential the germination index.,the vigor index and the respirations rate of black locust seeds increased and the conductivity desceased.Research found that the resistance of hard seeds of black locust was higher than that of nor-hard seeds under different stress conditions(salt stress,low temperature,artificial aging),indicating that the hard seeds had potential application value in production.

关 键 词：种子活力 差异性 刺槐 硬实种子 SOD酶活性 MDA含量 发芽指数 活力指数 上升趋势 呼吸速率 人工老化 应用价值 抗逆性 发芽势 电导率 盐胁迫 吸胀 浸种 

分 类 号：S572[农业科学—烟草工业] S792.27[农业科学—作物学]