叶子的四种基本染色技法
分染
色笔染色后，用清水笔将色块边缘晕染开来，形成均匀过渡的效果。
1.线笔勾出物体的外形、可用钉头鼠尾描．根部勾线至尖部时逐步提笔。
2.笔尖指向重色的一面染色。
3.半片叶子，染出三分之一左右宽的位置。
4.墨色未干时、清水笔将墨色往边缘染开，尖部逐步变淡。
5.以同样的方法.对另外半边叶片进行分染，由深到浅渐变。
罩染
分染后用透明的颜色薄薄地平涂，靠近叶片边缘时，用清水笔带一些分染。
1.勾线笔勾出叶片的结构，行笔要稳、慢、力透纸背。
2.用墨色分染叶片的结构，上深下浅。
3.用薄薄的汁绿罩染一半叶片，靠近尖部带些分染。
4.方法同上，罩染另外一半，颜色要薄，可多罩儿次。
5.叶片细节处理，勾勒出叶脉。
统染
根据画面明暗关系的需要，统一渲染几片叶或者花瓣，强调整体的明暗与色彩关系。
1.勾线笔勾出叶子的结构，线条稳健，根部粗、尖部细。
2.用墨色分染叶子的每个块面。由深到浅，变化自然协调，并分出水路。
3.墨绿色罩染叶片、边缘较浅，叶色薄，多罩几次。
4.用墨色统一叶片的整体深浅变化，画面和谐统一。
5.进一步处理叶片的明暗关系，勾勒出叶片的叶脉，丰富画面。
接染
两支笔或者几支笔蘸不同颜色，相向用笔，两色相遇，清水笔衔接，色彩在湿的时候渗接在一起，有灵动效果。
1.勾出叶片的外轮廓线，有时候也可以用铅笔轻轻勾出。
2.墨青接染出叶子较深的部分。
3.中间色(墨绿）接染墨青色、自然衔接。
4.黄绿色连续接染墨绿色部分，过渡仍要自然。
5.淡曙红最后接染黄绿色，面积要小。干后墨绿勾勒出叶茎、叶脉。
工笔银杏叶《金秋》画法步骤
步骤一：淡墨勾出银杏叶片，中墨皴擦出银杏的树干结构，注意墨色的层次变化，要灵活。↓↓↓
步骤二：藤黄平涂整个银杏叶片，颜色要薄，可多平涂几遍。注意叶子的主要虚实关系，淡墨进一步皴擦树干。↓↓↓
步骤三：朱磦加一点墨色调成赭色，分染银杏叶片，染出前后层次，赭墨皴擦树干。↓↓↓
步骤四：继续平涂薄藤黄，鹅黄分染叶子，不同的墨色点染树干。赭黄一定角度渲染底色，要有虚实变化。↓↓↓
步骤五：银杏树干的重点皴擦，用不同墨色多次皴擦，注意侧锋用笔，要有层次。↓↓↓
步骤六：银杏叶的着重染法。藤黄加白，白色多提染叶血，丰富层次，并勾出纹路和斑点。↓↓↓
步骤七：藤黄调白色提染银杏叶的尖部，勾出叶脉，赭色点出叶片斑纹，重墨点苔，三绿复点。整理画面，落款盖章。↓↓↓
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沙谢歪4961由此可见,叶在结构层次上是由多种细胞构成的什么? -
鬱逸亮15851864999 ______ 1. 叶子的结构主要由三个部分组成,2113分别是叶片5261、叶柄和托叶. 2. 而叶片又包括叶子的表皮4102、叶肉、叶脉、气孔、保卫细胞、栅栏组织和海绵1653组织. 3. 通常来说,表皮是包专括上表皮和下表皮,可属以使吸收阳光的面积增大.
沙谢歪4961植物叶在结构层次上叫做什么? -
鬱逸亮15851864999 ______ 植物叶在结构层次上是器官,根,茎,叶,花,果实,种子是种子植物的六大器官.
沙谢歪4961叶片的栅栏层和海绵层是植物体( )结构层次 A.细胞 B.组织 C.器官 D.系 -
鬱逸亮15851864999 ______ B 组成栅栏的细胞形态结构相似,组成海绵的细胞形态相似,所以是组织.
沙谢歪4961如图是植物叶片横切面结构示意图,请分析回答:(1)在生物学课程中,我们学过许多概念,.不同的概念间常有直接或间接的联系,用上些关联词把一些相... -
鬱逸亮15851864999 ______[答案] (1)叶片由表皮、叶肉和叶脉构成;表皮细胞的外壁上有一层透明的、不易透水的角质层,表皮主要起保护作用,散布在表皮细胞中的由半月形的保卫细胞组成的气孔是叶片与外界进行气体交换的窗口,叶肉细胞中的叶绿体是光合作用的场所;叶脉中...
沙谢歪4961下图是蚕豆叶片的横切面图,请据图回答(1)叶片的结构包括[1、2]______、[4]______和[5]______三个部分.(2)图中[1、2]是由一层排列紧密、______... -
鬱逸亮15851864999 ______[答案] (5)叶片的结构包括三部分:表皮、叶肉、叶脉. (2)表皮:为叶片表面的十层初生保护组织,通常有上、下表皮之分,上表皮位于腹面,下表皮位于背面.表皮细胞扁平,排列紧密,通常不含叶绿体,外表常有十层角质层.有些表皮细胞常分化形成气...
沙谢歪4961整张叶从结构层次来说属于? -
鬱逸亮15851864999 ______ 器官.叶片表面的表皮属于保护组织,被表皮包被的叶肉属于营养组织,叶脉中含导管和筛管,属于输导组织.不同的组织按一定次序结合,构成有一定形态和功能的器官.
沙谢歪4961整张叶从结构层次来说属于? -
鬱逸亮15851864999 ______[答案] 根茎叶,花果实种子都是器官.
沙谢歪4961从植物体的结构层次来看,叶属于? -
鬱逸亮15851864999 ______[答案] 叶属于:器官. 植物的六大器官:根、茎、叶,花、果实、种子.
沙谢歪4961如图是某同学在“观察叶片的结构”时绘制的菠菜叶横切面示意图,请分析回答:(1)从结构层次方面看:①、⑤属于______组织,②、④属于______组... -
鬱逸亮15851864999 ______[答案] (1)叶片由表皮、叶肉和叶脉组成,表皮包括上表皮和下表皮,表皮由一层排列紧密、无色透明的细胞构成,表皮细胞的外壁上有一层透明的、不易透水的角质层,表皮主要起保护作用,.因此[①、⑤属于保护组织,是一层排列紧密、无色透明的细胞...
沙谢歪4961从植物体的结构层次来看,叶属于什么? -
鬱逸亮15851864999 ______[答案] 产生能量的地方(植物靠叶子合成能量)