Storage and germination of seeds of Handroanthus heptaphyllus (Mart.) Mattos

The aim of this study was to determine the substrate and the most suitable sowing method for germination, as well as the environment for storage of Handroanthus heptaphyllus seeds (ipê-roxo), and infer the health quality provided by different packaging. Experiment 1 has assessed the treatments (substrates - blotting paper, filter paper, vermiculite, sand, besides paper roll; and sowing methods - among and on the substrates). Experiment 2 has assessed storage in three environments (air conditioned room - 18 °C and 49% of relative humidity (RH); cold and wet chamber - 8 °C and 80% RH; and dry and cold chamber - 7.5 ºC and 55% RH) , for 300 days. Handroanthus heptaphyllus seed germination test can be performed using seeding among blotting paper, vermiculite, on sand, between sand, on vermiculite and between filter paper. The storage of the seeds in plastic bags kept in an air conditioned room and/or in a dry and cold chamber is suitable for the preservation of Handroanthus heptaphyllus seeds for a period of 300 days. The packaging in a dry and cold chamber environment has provided a lower incidence of fungi associated with the Handroanthus heptaphyllus seeds.

本研究旨在确定七叶紫葳（Handroanthus heptaphyllus，俗称ipê-roxo）种子萌发所需的基质、最适宜的播种方式，以及种子贮藏环境，并推断不同包装方式对种子健康品质的影响。试验1设置两类处理：基质（吸水纸、滤纸、蛭石、沙子及卷纸）与播种方式（基质间播种、基质表面播种），并对其开展评估。试验2设置三种贮藏环境：空调室（18℃、相对湿度（Relative Humidity，RH）49%）、冷湿箱（8℃、RH 80%）及干冷箱（7.5℃、RH 55%），贮藏周期为300天。七叶紫葳种子萌发试验可采用以下方式进行：吸水纸间播种、蛭石间播种、沙子表面播种、沙子间播种、蛭石表面播种及滤纸间播种。将七叶紫葳种子装入塑料袋后，置于空调室或干冷箱中贮藏，可满足300天的种子保存需求。在干冷箱环境下进行包装贮藏，可降低七叶紫葳种子携带真菌的侵染发生率。