Seed Quality Evaluation of Senegalia polyphylla (DC.) Britton & Rose

ABSTRACT The aim of this study was to evaluate the quality of Senegalia polyphylla seeds from different trees by X-ray (XR) and electric conductivity (EC) tests. Seeds from three different trees were used. The seeds were classified through radiography in: full, malformed, with small damage and empty, and were used in the germination test. For the EC test, the best volume of water (50 and 75 mL) was initially tested at 25 °C, and subsequently, the different soaking times (12, 24, 48, 72, 96 and 120 hours) using the best volume of water. Concomitantly, the germination test was performed. Tree I presented a higher percentage of full seeds in XR, higher percentage of germination and fewer leachates in the EC; tree III, however, was the opposite. The tests showed to be efficient for the quality evaluation of Senegalia polyphylla seeds, differentiating the trees.

摘要 本研究旨在通过X射线（XR）与电导率（EC）试验，评估不同母树所产多叶金合欢（Senegalia polyphylla）种子的品质。本研究选用3株不同母树的种子开展实验。通过放射成像法将种子划分为饱满、畸形、轻度损伤及空瘪四类，并将分级后的种子用于发芽试验。针对电导率试验，首先在25℃条件下测试最佳用水量（50 mL与75 mL）；随后采用筛选出的最优用水量，设置12、24、48、72、96及120小时共6个浸种时长梯度开展试验，同步进行发芽试验。结果表明，母树1的X射线成像中饱满种子占比更高，发芽率也更高，电导率试验的浸出液含量更低；而母树3的各项指标则恰好相反。本研究所用的两种试验方法均可有效用于多叶金合欢种子的品质评价，且能够区分不同母树所产种子的品质差异。