含羞草的特征有那些?

不少于200字,不多于250字
2025-03-29 12:33:24
推荐回答(3个)
回答(1):

含羞草形状似绒球,开花后结荚果,果实呈扁圆形。叶为羽毛状复叶互生,呈掌状排列。大约在盛夏以后开花,头状花序长圆形,2-3个生于叶腋。花为白色、粉红色,花萼钟状,有8个微小萼齿,花瓣四裂,雄蕊四枚,子房无毛。

含羞草的花、叶和荚果均具有较好的观赏效果,且较易成活,适宜在阳台、室内的盆栽花卉。在庭院等处也能种植。

含羞草与一般植物不同,它在受到人们触动时,叶柄下垂,小叶片合闭,因此人们理解它为“害羞”,故称之为感应草、喝呼草、含羞草、知羞草和怕丑草。

扩展资料:

含羞草的感知特性:

含羞草细胞是由细小如网状的蛋白质“肌动蛋白”所支撑。产生闭合运动时,肌动蛋白的磷酸会脱落,只要让含羞草吸收不让磷酸脱落的化合物,经触碰也不会起变化。当肌动蛋白束散开时,细胞被破坏,结果水分跑出来,以致产生闭合运动。

植物的运动通常是由细胞内膨压改变造成的。大部分成熟的植物细胞都有一个很大的液泡。当液泡内充满水分时,就压迫周围的细胞质,使它紧紧贴向细胞壁,而给予细胞壁一种压力,使细胞硬胀,像吹满了气的气球一样。

参考资料来源:百度百科--含羞草

回答(2):

1、含羞草最大的特征是它受到刺激(比如碰触)时,含羞草的叶子会收缩并合拢。如果刺激很强,刺激将迅速依次转移到邻近的小叶,甚至整个复叶的小叶,导致叶柄下垂。  

若刺激强度较大,甚至可使整株植物的小叶合拢,复叶下垂。但过一段时间,又可恢复原状。含羞草对震动的反应也很快,受到刺激0。1s后就开始产生反应,几秒钟内完成。  

2、在光线较弱时比较敏感,平常叶枕内的水分支撑着叶片:但是当它受到外力刺激时,叶枕内的水分会立即流向别处,使含羞草的叶片闭合。另外,它在晚上都会自动收缩起来。这种独特之处,也正是含羞草名称及昵称的来源。

扩展资料:

含羞草的种植方法:  

1、需经常浇水,含羞草原属热带植物,喜欢湿润的环境,所以要经常保持盆土湿润,夏天视盆土情况浇水,大概一天一次,不要让土壤变干,可经常向植株喷水,冬季为防止冻害要减少浇水量。  

2、选择肥沃疏松的土壤。含羞草对土壤要求不高。普通的花园土壤就足够了。然而,如果含羞草想要长得更好,选择疏松肥沃的土壤,它可以混合腐殖质土和沙土,或者只混合腐殖质土。腐殖土也是一个不错的选择。  

3、确保充足的阳光。含羞草喜欢阳光。把它放在阳光明媚的阳台上或窗户旁边。充分暴露在阳光下有利于含羞草的生长。

参考资料来源:百度百科-含羞草

回答(3):

含羞草原产于南美热带地区,喜温暖湿润,对土壤要求不严,喜光,但又能耐半阴,故可作室内盆花赏玩。含羞草小叶细小,羽状排列,用手触小叶,小叶接受刺激后,即会合拢,如震动力大,可使刺激传至全叶,则总叶柄也会下垂,甚至也可传递到相邻叶片使其叶柄下垂,仿佛姑娘怕羞而低垂粉面,故名含羞草。那些么是不是真的叶子怕羞呢?当然不是。
含羞草是生长在阳光充足的草地上的一种低矮草本植物,别称"知羞草"、"怕痒花"、"惧内草"。它是一种豆科植物,叶互生,具二回羽状复叶。全株生有毛茸及锐刺,高约为二十至六十公分。含羞草的叶子具有相当长的叶柄,柄的前端分出四根羽轴,每一根羽轴上著生两排长椭圆形的小羽片,它大约在盛夏以后开花,粉红色的头状花序散布在草原上,像一团团疏落的小绒球。你一摸它,它就害羞起来了,先是小羽片一片片闭合起来,四根羽轴接著也合拢了,然后乾脆整个叶柄都垂下来。

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