摘要
栎属（Quercus）广泛分布于亚洲、欧洲、北美洲和非洲大陆,是北半球森林生态系统中的优势种和建群种（周浙昆,1992）。在过去的30多年,亚洲、东北美洲、欧洲及地中海沿岸等均出现栎林的衰退现象（Giertychetal.,2010;Bonneretal.,1987）,自然更新过程中有很多因素导致更新成功率低,种子的自然更新远远抵不上栎林的减少量（Houetal.,2010）。因此,栎类容器苗的需求量越来越多。容器育苗要求种子快速整齐地萌发和生长,因为如果萌发延续时间较长,最先长出的叶片会遮住临近的幼苗,并阻挡水分的运输（Giertychetal.,2011）。
Over the last three decades, decline of oak （Quercus acutissima） natural regeneration has drawn wide attention. Exploration of the causes and development of the seedling technology, which promotes quick and uniform germination of oak seeds, arise interesting of forest researchers. In this paper, the seed cold storage and mechanical damage treatments were studied on germination of Q. acutissima. Methanol extracts of embryo, cotyledon and pericarp of oak seeds were used to investigate existence of inhibitory substance by testing germination of Brassica campestris seeds that were cultivated in Sanyo growth cabinet. The results showed that： （1） removing scar, pericarp, or cutting off a small piece of basal cotyledon increased the rooting rate and percentage, however, cutting off more than 1/2 cotyledon had negative effects; （2） the seed cold storage accelerated the germination; （3） Germination rates of B. campestris seeds treated by methanol extracts from embryo of Q. acutissima seeds were significantly lower than control, and inhibitors from embryo, cotyledon and pericarp played a negative role in growth of root and shoot of B. campestris seedlings, indicating that the inhibitors of oak seeds might mainly restrict growth of root and shoot themselves, and be responsible for germinating irregularly. The results have guiding significance for directly seeding afforestation and seedling of Q. acutissima.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2012年第9期164-170,共7页
Scientia Silvae Sinicae
基金
“十一五”国家科技支撑计划(2006BAD09B06
2006BAD03A0308)
国家重点基础研究发展计划“973计划”(2010CB951301-6)
林业公益性行业科研专项(200804022B-3)
水利部“948”项目(200207)
关键词
机械处理
冷藏
内源抑制物质
种子
麻栎
mechanical damage
cold storage
inhibitors
seed
Quercus acutissima
