矮莖紫露草 Tradescantia crassifolia v acaulis
多年前曾在MESA買過種子,被我種死,今年又再度購入。
我稍為查了一下,Tradescantia屬是個以嚴格不親合為主的屬。
我能找到,唯一直接提到acaulis的研究資料是這個:
Self-incompatibility in the Commelinaceae 1981
S. J. OWENS Annals of Botany
Vol. 47, No. 5 (May 1981), pp. 567-581
這份資料把Tradescantia acaulis和Tradescantia crassifolia 當成兩個不同的物種。
我還不打算深究他的分類學差異。
研究方法;跟植物園要不同編號的植物,花粉抹上去,過幾周切開看花粉管有沒有插進去。
有插進去就當他自交親合。
Tradescantia acaulis:
找來2個編號,共2株植物。結果不親合
染色體2n=22
Tradescantia crassifolia
找來15個編號,共22株植物。結果不親合,有幾株出現微親合。
染色體2n=12,22+BS
In T. crassifolia (Kew accession no. 326-71 .028 16 C, D) five capsules were set from 26 self-pollinations in the former individual (19 per cent seed set) while six capsules were set from 96 selfs in the latter (6 per cent set). These results show that a partial breakdown of the system has occurred but whether it is permanent or the occurrence of pseudo-self-compatibility in an SI species
has not been determined yet.
T. crassifolia Kew植物園編號no. 326-71 .028 16C的實驗體,叢26個自花授粉測試中,結出了5個果莢,每果19種子。
Kew植物園編號no. 326-71 .028 16D)則是96嘗試結6果,每果6種子。
由此可見某些個體是自交微親合。
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