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楼主: 木乃伊

古植物学基础

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 楼主| 发表于 2006-7-4 08:48:00 | 显示全部楼层
<p>叶脉</p><p><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt;"><strong>网状脉序<span lang="EN-US">(reticular venation)</span></strong></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">&nbsp; </span><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">叶片上有<span lang="EN-US">1</span>条或几条主脉,主脉向两侧分出许多侧脉,侧脉再分出许多细脉,相互连接成网状。双子叶植物的叶脉大多数属此类型。网状脉序又因主脉数和侧枝分支的不同,再分为羽状(网)脉<span lang="EN-US">(pinnate venation)</span>和掌状(网)脉<span lang="EN-US">(palmate venation)</span>,前者如梨、枇杷、茶、桑、柳等的叶脉;后者如棉、南瓜、蓖麻的叶脉。 </span></p><p><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt;"><strong>平行脉序</strong></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">(parallel venation)&nbsp; </span><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">叶片上中脉和侧脉都自叶片的基部发出,大致互相平行,至叶片的顶端汇合,或侧脉平行与中脉呈一定角度。各平行脉间有细脉横向连接,但不成网状。单子叶植物的叶脉大多属此类型。平行脉又可分为直出(平行)脉,中脉与侧脉平行地自叶基直达叶尖,如水稻、小麦、玉米等的叶脉;有的为侧出(平行)脉,侧脉与中脉垂直,自中脉平行地直达叶缘,如芭蕉、香蕉等的叶脉;有的为射出(平行)脉,各叶脉从基部辐射而出,如棕榈的叶脉;有的平行脉自基部发出,在叶的中部彼此距离逐渐增大,呈弧状分布,最后在叶尖汇合,如车前、紫萼等的叶脉。 </span></span></p><p><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">待续。。。</span></span></p>
发表于 2006-7-6 03:46:00 | 显示全部楼层
恩,很基础的好文
 楼主| 发表于 2006-7-8 08:22:00 | 显示全部楼层
<p><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">藤本植物<span lang="EN-US">(Vine</span>或<span lang="EN-US">liana)<br/>&nbsp;&nbsp;&nbsp; </span>植物体细长,不能直立,只能依附别的植物或支持物,缠绕或攀援向上生长的植物。藤本依茎质地的不同,又可分为木质藤本<span lang="EN-US">(</span>如葡萄、紫藤等<span lang="EN-US">)</span>与草质藤本<span lang="EN-US">(</span>如牵牛、长豇豆等<span lang="EN-US">)</span>。<p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 23pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-layout-grid-align: none;"><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">木本植物</span><font face="宋体, MS Song"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">(woody plant)</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><p></p></span></font></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 23pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><font face="宋体, MS Song">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font></span><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">植物体木质部发达,茎坚硬,多年生。木本植物因植株高度及分枝部位等不同,可分为:</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 23pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><font face="宋体, MS Song">&nbsp;&nbsp;&nbsp; 1. </font></span><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">乔木</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><font face="宋体, MS Song">(tree)&nbsp; </font></span><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">高大直立的树木,高达</span><chmetcnv wst="on" unitname="米" sourcevalue="5" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><font face="宋体, MS Song">5</font></span><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">米</span></chmetcnv><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">以上,主干明显,分枝部位较高,如松、杉、枫杨、樟等,它们有常绿乔木</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><font face="宋体, MS Song">(evergreen tree)</font></span><span style="FONT-SIZE: 12pt; COLOR: #3333
 楼主| 发表于 2006-7-8 08:23:00 | 显示全部楼层
<p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 23pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-layout-grid-align: none;"><span style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;"><span style="FONT-SIZE: 10.5pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">草本植物<span lang="EN-US"> (herbaceous plant</span>或<span lang="EN-US">herb)<br/>&nbsp;&nbsp;&nbsp; </span>植物体木质部较不发达至不发达,茎多汁,较柔软。按草本植物生活周期的长短,可分为:<span lang="EN-US"><br/>&nbsp;&nbsp;&nbsp; 1. </span>一年生草本<span lang="EN-US">(annual)&nbsp; </span>在一个生长季节内就可完成生活周期的,即当年开花、结实后枯死的植物,如水稻、大豆、番茄等。<span lang="EN-US"><br/>&nbsp;&nbsp;&nbsp; 2. </span>二年生草本<span lang="EN-US">(biennial)&nbsp; </span>第一年生长季(秋季)仅长营养器官,到第二年生长季(春季)开花、结实后枯死的植物,如冬小麦、甜菜、蚕豆等。<span lang="EN-US"><br/>&nbsp;&nbsp;&nbsp; 3. </span>多年生草本<span lang="EN-US">(perennial herb)&nbsp; </span>能生活二年以上的草本植物。有些植物的地下部分为多年生,如宿根或根茎、鳞茎、块根等变态器官,而地上部分每年死亡,待第二年春又从地下部分长出新枝,开花结实<span lang="EN-US">, </span>如藕、洋葱、芋、甘薯、大丽菊等;另外有一些植物的地上和地下部分都为多年生的,经开花、结实后,地上部分仍不枯死,并能多次结实,如万年青、麦门冬等。<span lang="EN-US"><br/>&nbsp;&nbsp;&nbsp; </span>草本植物中,一年生、二年生和多年生的习性,有时会随地理纬度及栽培习惯的改变而变异,如小麦和大麦在秋播时为二年生草本,在春播时则成为一年生草本;又如棉花及蓖麻在江浙一带为一年生草本,而在低纬度的南方可长成多年生草本。</span></span></p>
发表于 2007-3-23 17:31:18 | 显示全部楼层
发表于 2007-3-27 15:05:16 | 显示全部楼层
怎么没图!顶上来有空再看!                    p
 楼主| 发表于 2007-3-27 16:05:56 | 显示全部楼层
这种老帖也能翻得出来,论坛改版把图片格式数据改丢了,当初有的。
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