CAJ | 학술논문

苏铁是一类起源古老而孑遗的裸子植物,攀枝花苏铁国家级自然保护区内所保护的攀枝花苏铁Cycas pan-zhihuaensis,是迄今为止世界上发现的纬度最高,面积最大,数量最多的野生苏铁种群。攀枝花苏铁群落共有物种82科253属318种;珍稀濒危植物除攀枝花苏铁外,还有云南梧桐Firmiana major、栌菊木Nouelia insignis和龙棕Trachycarpus nana。区系组成以热带性质为主,尤以泛热带为多。单种科、单种属和寡种属占绝对优势,表现出区系明显的古老性和残遗性现象。干热河谷区系特征明显,金沙江干热河谷特有种和标志种占到总种数的近1/3。一些残遗种或其后裔的起源和发生背景与古地中海有密切关系。结合当地的丰富的苏铁类植物和种子蕨化石植物群的发现,可以初步推断攀枝花苏铁群落是这些古生代类型的延续,其植物区系起源古老。该地区应是中国植物区系的分化中心,也很可能就是世界苏铁植物重要的起源与发展中心。
소철시일류기원고로이혈유적라자식물,반지화소철국가급자연보호구내소보호적반지화소철Cycas pan-zhihuaensis,시흘금위지세계상발현적위도최고,면적최대,수량최다적야생소철충군。반지화소철군락공유물충82과253속318충;진희빈위식물제반지화소철외,환유운남오동Firmiana major、로국목Nouelia insignis화룡종Trachycarpus nana。구계조성이열대성질위주,우이범열대위다。단충과、단충속화과충속점절대우세,표현출구계명현적고로성화잔유성현상。간열하곡구계특정명현,금사강간열하곡특유충화표지충점도총충수적근1/3。일사잔유충혹기후예적기원화발생배경여고지중해유밀절관계。결합당지적봉부적소철류식물화충자궐화석식물군적발현,가이초보추단반지화소철군락시저사고생대류형적연속,기식물구계기원고로。해지구응시중국식물구계적분화중심,야흔가능취시세계소철식물중요적기원여발전중심。
Cycads are a class of ancient relict gymnosperm.Cycas panzhihuaensis protected in Panzhihua Cycad National Nature Reserve,is wild cycad populations with the largest area and the largest number,and is found in the world＇s most northern latitudes.In cycad assemblage,there are about 318 wild spermatophyte species found,belonging to 253 genera of 82 families.In addition to Cycas panzhihuaensis,the rare and endangered plants are Firmiana major,Nouelia insignis and Trachycarpus nana.Tropical elements of cycad floristic composition are the richest,and in particular pan-tropical elements are plentiful.The overwhelming of single species families,monotypic genera and minor genera clearly exhibit the ancient flora and relict phenomenon.The total number of endemic species and characteristic species of dry-hot valleys in the Jinsha River account for nearly 1/3 of total species,indicating that the attributes of dry-hot valley flora are significant.A number of relict species or their descendants,their origin and occurrence background are closely related to the ancient Mediterranean.Taking account of local rich cycads and Pteridosperm fossil flora found,it can initially inferred that Cycas panzhihuaensis assemblage is a continuation of those ancient taxa,with the origin of the ancient flora.This region should be a differentiation center of the flora of China,is also likely to be the main origin and development centers for the world cycads.