Through paired-comparison analyses, compositions of PSc and PPc were compared to those of nearby non-proliferated cones or to vegetative shoots. Between 41% and 88% of trees of different ages that bore seed cones also bore some PSc; 17–58% with pollen cones also had PPc. The total number...
Pine branches with female seed cones and male pollen cones,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、工商
网络风会把花粉带到种实 网络释义 1. 风会把花粉带到种实 小的雄球花(pollen cones)产生花粉,风会把花粉带到种实(seed cone)的花蕾上,使种实发育成较大的含有种子的球果。 … science.bowenwang.com.cn|基于 1 个网页
PROMOTION OF CONE AND SEED PRODUCTION BY GIBBERELLIN-A4/7 AND DISTRIBUTION OF POLLEN AND SEED CONES ON SITKA SPRUCE GRAFTS IN A CLONE BANK 喜欢 0 阅读量: 14 作者: PHILIPSON,JJ 摘要: - 关键词: - 被引量: 13 年份: 1987
In both experiments, GA(4/7) treatment significantly reduced the 1000-seed weight but did not significantly affect the number of filled and empty seeds per cone. In both experiments, grafts stimulated to increase seed production tended to produce smaller cones. In experiment 2, pollen production ...
Seed plants include gymnosperms and angiosperms. Gymnosperms—cycads, ginkgo biloba, gnetophytes, and conifers—typically form cones. The pollen cones contain male gametophytes. The ovulate cones contain female gametophytes and form exposed seeds when fertilized. Angiosperms, the most diverse and ...
13.Temporal and spatial distribution of the pollen cones and seed in Taxus yunnanensis云南红豆杉小孢子叶球和种子的时空分布规律 14.Sap Flow Changes of Picea crassifolia and Larix principis-rupprechtii and Relation to Environmental Factors in Loess Alpine Area青海云杉、华北落叶松边材液流变化规律及其与气象...
Ginkgo, like the cycads, is dioecious and has ancestrally motile sperm. Male Ginkgo trees bear reproductive structures that are called “cones” but that do not bear structures that resemble sporophylls. These pollen cones consist of a central axis with lateral stalks (Figure 5.17D–E), each...
Although individual pines produce pollen and seed, only one-third of the covariation within trees was shared. As compared to seed cones, pollen had lower inter-annual variation at the level of the individual tree and was more synchronous. However, pollen and seed production were similar with ...
The full seed production is discussed in relation to methods and timing of pollen forcing. It is anticipated that 1 kg of seeds could be produced annually in a 1250 m2 greenhouse.Øystein JohnsenDiv. of SilvicultureOla Gram Dæhlen