不同试剂解除天山野生蔷薇种子休眠的效果

为野生蔷薇的训化繁育提供参考,以天山野生的腺齿蔷薇(Rosa albertii Regel)、密刺蔷薇(Rosa spinosissima L.)和宽刺蔷薇(Rosa platyacantha Schrenk)的种子为材料,低温层积后采用高锰酸钾(KMnO_4,浓度0.1%、0.2%和0.3%)、硫酸铜(CuSO_4,浓度0.1%、0.2%%和0.3%)和萘乙酸(NAA,浓度50mg/L、100mg/L和150mg/L)3种试剂不同浓度浸泡处理后进行培养,50d后种子无发芽时统计发芽率。结果表明:3种试剂几乎没有打破腺齿蔷薇的休眠,可打破密刺蔷薇和宽刺蔷薇的休眠,宽刺蔷薇的发芽率高于密刺蔷薇,高锰酸钾和硫酸铜处理效果优于萘乙酸,其中以KMnO_4处理密刺蔷薇、宽刺蔷薇的效果最好,0.2%KMnO_4处理密刺蔷薇的发芽率最高,为26.7%;0.2%和0.3%KMnO_4处理宽刺蔷薇的发芽率最高,均为33.3%。

角甲螨属一新种及若甲螨科三新记录——(甲螨亚目:温奥甲螨科,若甲螨科)

本文研究并描述了角甲螨属一新种网角甲螨Ceratoppia retilia sp.n.和若甲螨科三新记录:棘光亮奥甲螨Lucoppia spinosissma、隐缺菌甲螨Scheloribates latoincisus和断缝前齿菌甲螨S.praeincisus Var.interruptus。本新种与C.erassiseta相似,但叶长仅为前背板的2/3。而后者的叶长几达吻之侧缘。此外,本新种背极具五角形或六角形网纹,本属其它种皆无此网纹。

Modern Condition of Coenopopulation of <i>Tulipa fosteriana W. Irving</i>in Southern Part of Uzbekistan

This article reveals the data about two coenopopulation of Tulipa fosteriana in Zeravshan mountain ridge in the vicinity of the Takhta-Karachi pass in the border of Kashkadarya basin. Thus, the studied coenopopulation of T. fosteriana is normal, incomplete. The absence of senile individuals in the examined coenopopulation is associated with the biological characteristic of the species. In tulips, as in many geophytes, most individuals completely finish their large life cycles in a generative state. The ontogenetic spectra of the studied coenopopulation coincide with the characteristic ones, and thereby reflect the biological characteristics of the species.