四种植物粘液繁殖体粘液的比较研究

对百里香(Thymus serpyllum)、平车前(Plantago depressa)、盐生车前(P．maritima)、野亚麻(Linum stelleroides)进行了粘液繁殖体粘液情况比较．以在水浸和浇水条件下植物种子粘沙量的多少衡量粘液量．结果表明，对于不同浸水时间处理，野亚麻和平车前未表现明显差异，盐生车前和百里香有随浸泡时间加长而粘液溶出量增多的趋势．对于不同浇水量处理，4种植物均有随浇水量增多而粘液增多的倾向．浸泡80min后，盐生车前种子的粘液粘沙使重量达原重的60多倍，平车前种子达原重的10倍左右，百里香和野亚麻种子达原重的4～6倍左右．浇水8mm后，盐生车前种子的粘液粘沙使重量达原重的20多倍，平车前种子达原重的6～10倍左右，百里香和野亚麻种子达原重的2～7倍左右．将各种处理平均，得到各种植物粘沙种子百分率为：野亚麻67．7％，百里香94．5％，平车前97．7％，盐生车前99．5％．

A comparative study on mucilaginous diaspores of four plant species

A comparative study was conducted on the mucilaginous diaspores of Thymus serpyllum, Plantago depressa, Plantago maritima, and Linum stelleroides. The mucilage amount was estimated by the sand-holding capacity of seed under soaking and watering conditions. Soaking and watering experiments each had 4 treatments. The results indicated that under different soaking time treatments, the mucilage amount of Linum stelleroides and Plantago depressa was of nonsignificant difference, but that of Plantago maritima and Thymus serpyllum was increased with prolonged soaking-time. Under different watering treatments, the mucilage amount of the 4 plant species all had an increasing trend along with the increased water volume. After soaking for 80 min, the weight of sand-holding seed of Plantago maritima was 60 times more than its seed weight, Plantago depressa was 10 times, and Thymus serpyllum and Linum stelleroides was 4-6 times. After watering with 8 mm rainfall, the weight of sand-holding seed of Plantago maritima was 20 times more than its seed weight, Plantago depressa was 6-10 times, and Thymus serpyllum and Linum stelleroides was 2-7 times. In averaging various treatments, the percentage of the sand-holding seed to the total seed of Linum stelleroides, Thymus serpyllum, Plantago depressa and Plantago maritima was 67.7%, 94.5%, 97.7% and 99.5%, respectively.