南京椴种子休眠萌发特性研究  

Study on Dormancy and Germination Characteristic of Tilia miqueliana

作　　者：董爱新 孔雨光 王因花[1] 沈永宝[3] DONG Aixin;KONG Yuguang;WANG Yinhua;SHEN Yongbao(Shandong Provincial Academy of Forestry/Shandong Provincial Key Laboratory of Forest Tree Genetic Improvement,Jinan Shandong 250014;Shandong Territorial and Spatial Planning Institute,Jinan Shandong 250014;Nanjing Forestry University,Nanjing Jiangsu 210000)

机构地区：[1]山东省林业科学研究院/山东省林木遗传改良重点实验室,济南250014 [2]山东省国土空间规划院,济南250014 [3]南京林业大学,南京210000

出　　处：《山东林业科技》2023年第3期59-63,共5页Journal of Shandong Forestry Science and Technology

基　　金：山东省重点研发计划项目(2017GNC10112)。

摘　　要：以去掉果皮的南京椴种子为材料,对其萌发特性进行了探讨,结果表明:南京椴离体胚在光照和黑暗条件下发芽率都达100%,说明南京椴的胚不存在休眠,且具有很强的萌发能力;去皮种子发芽率仅有14%;而去掉子叶周围胚乳(子叶露出)的种子,100%的种子下胚轴伸长,但是仅有59%的种子胚根突破胚乳而萌发出幼根;去除胚乳帽的种子发芽率为98%,但近50%的子叶始终未能展开;去掉部分胚乳,但子叶和胚根均未露出的种子发芽率为14%。这些结果说明胚乳和种皮是造成种子休眠的主要原因,尤其是胚乳和胚乳帽的作用更为关键。The dormancy and germination characteristic was systematically studied in this thesis,taking seeds without capsule as material and the results showed that:The germination percentage of isolated seed embryo was 100%either in the light or dark culture,indicating that the seed embryo was not dormant and able to germinate;the germination percentage of decoated seed was 15%;when the endosperm surrounded cotyledon was removed,the hypocotyls of all the seed elongated but only 60%seed radicle could break through the endosperm;when the endosperm cap(the endosperm wrapping the radicle)was removed,98%seeds could germinate,but there were still 50%seed cotyledon couldn’t extend and only 14%seeds with wrapping cotyledon and radicle could germinate.These results indicated that the endosperm,especially the endosperm cap,was the barrier to germination.

关 键 词：南京椴 休眠 萌发特性 

分 类 号：S722.14[农业科学—林木遗传育种]