摘要
对天然生长于祁连山自然保护区隆畅河自然保护站的濒危植物蒙古扁桃的带内果皮及去内果皮种子的形态、萌发过程及成苗生长状态进行了试验研究。结果表明,蒙古扁桃带内果皮种子长1.344～1.389 cm,宽0.872～0.922 cm,厚0.711～0.740 cm,种子单粒重0.364～0.419 g,千粒重364～419 g;蒙古扁桃去内果皮种子长0.953 cm,宽0.530～0.539 cm,厚0.383～0.395 cm,单粒重0.087～0.097 g,千粒重87～97 g。单粒种子的内果皮平均重量为0.282±0.008 g。种子的单粒重与长度、宽度、厚度的相关极为显著;种子重量与其种子长度、宽度、厚度的关系可分别用直线、幂函数曲线和多项式曲线方程来描述。不同温度温水浸泡处理的蒙古扁桃带内果皮及去内果皮种子的发芽过程分别适合用对数和多项式曲线方程来描述,其种子发芽过程中的发芽数量大致都呈单峰曲线状态;内果皮对蒙古扁桃种子的萌发有机械抑制作用。蒙古扁桃种子成苗(平均苗龄20天和14天)后苗木高度小于根长,但其地上部分的生物量大于地下部分的生物量,含水率则小于地下部分。
We observed the seed morphology, germination and seedling growth of endangered plant, Prunus mongolica Maxim, in Longchang River Natural Conservation Station in Qilian Mount National Natural Conservation Zone. These seeds were checked with or without their pericarp. It was shown that the length of the seeds with pericarp was 1. 344 - 1. 389em, O. 872 - O. 922cm in width, and O. 711 - O. 740cm in thickness, weight of single seeds was O. 364 -O. 419g, and thousand seed weight was 364 -419g; while those without pericarp were： O. 953cm in length, O. 530 -O. 539cm in width, O. 383 -O. 395em in thickness, single seed weight was O. 087 -0. 097g, thousand seed weight was 87 - 97go the average weight of pericarp of single seed was 0. 282±0. 008g. There was significant correction of single seed＇s weight with its length, width and thickness. The relationship of seed weight with seeds＂ length, width and thickness could be described by linear, power function and polynomial curves. The germination rate of the seeds with or without pericarp and treated with different temperature of tepid water peak bove could value. ground be described by logarithm or polynomial functions. The germination number generally showed a single The pericarp may act as mechanic barrier for seed germination. The 14 or 20 day old seedlings had apart shorter than its roots, but the former had more biomass than the later. And water content was higher in under ground part of the seedlings.
出处
《西部林业科学》
CAS
2010年第1期36-42,共7页
Journal of West China Forestry Science
基金
国家“十一五”科技支撑计划子专题2007BAC03A02-06-01
