种子引发对辣椒和茄子种子在不同温度下萌发和出苗的影响

研究了蛭石引发和KNO_3渗透引发对辣椒和茄子种子在不同温度下萌发和出苗的影响。结果表明:种子引发提高了辣椒和茄子种子在不同温度下的萌发和出苗特性,温度越低,效果越显著。与对照相比,在昼温20℃/夜温15℃时,蛭石引发处理后辣椒和茄子种子的发芽势提高了53.3%—82.0%,发芽指数提高了3.1—6.8,活力指数提高了0.1—0.3,出苗率提高了25.7%—57.1%,出苗指数提高了0.8—2.3,鲜重增加了0.80—0.89 g,平均出苗时间提前了2.9—4.9 d;KNO_3渗透引发处理后辣椒和茄子种子的出苗率提高了5.7%—17.1%,差异达显著水平。蛭石引发效果好于KNO_3渗透引发。

种子引发技术研究进展

种子引发是一项能有效提高种子质量的种子处理技术,具有广阔的应用前景。对现有种子引发的基本技术,如水引发、滚筒引发、渗调引发、固体基质引发,以及生物引发、膜引发、脱落酸引发、起泡柱引发等种子引发新技术进行了概述,对未来种子引发技术进行了研究讨论。

不同引发因子对辣椒和茄子种子萌发的影响

研究了引发温度、引发时间、水份、渗透势等不同引发因子对辣椒和茄子种子萌发的影响。结果表明:固体基质引发和渗透调节引发的最适条件分别为15℃、80%含水量、5 d和15℃、-1.5 MPa KNO_3、24 h,均显著提高了辣椒和茄子种子的发芽势、发芽指数和活力指数;固体基质引发效果好于KNO_3渗透调节引发。

Effect of priming on the germination of Peltophorum dubium seeds under water stress

Peltophorum dubium seeds provided by Anhembi, SP were scarified in 98% H2SO4 for 15 min to overcome mechani-cal dormancy. Seeds were primed in solutions of 0.2% Captan at 10 C and 27C, PEG 6000 -1.0 MPa at 10C and 27C, 0.5 mol KNO3, 0.75 Mol KNO3, 1.0 Mol KNO3. Eight treatments including the primed seeds and nonprimed seeds, five replicates with 100 seeds for each treatment, were set to 15-cm-Petri dish with double filter paper moistened with testing solution PEG in refrigerator at 27C. For the experiments of all the groups, osmotic potential were 0.0, -0.2, -0.4, -0.6, -0.8, -1.0, -1.2, and -1.4 MPa. P. dubium seeds were also set to water stress experiment in rolled paper with PEG solutions from 0.0 to -1.0 M Pa. Germination percentage decreased with the increase of PEG concentration. Control group had a better germination percentage than other groups. Germination hardly occurred in PEG -1.4 MPa.