![image.png](https://cdn.steemitimages.com/DQmVUHapjfYNPSgiueKBDpPKiQZroW4foqfnUuAMvf3HSSp/image.png) >德国生物学家恩斯特·海克尔 Ernst Haeckel在《自然界的艺术形态》一书中绘制的描述藓类植物的插画,图片引用自维基百科 苔藓植物包括藓(Mosses)、苔(Liverworts)和角苔(Hornworts)三个大类群,其中的藓类植物有约13,000种,是陆生植物中仅次于被子植物的第二大类群。 苔藓虽然体型矮小,却是真正的“高等植物”。 生长在森林冠层下的苔藓能够适应林下阴暗环境,利用弱光进行光合作用,成为生态系统中主要的生产者。 相比于蕨类、裸子植物、被子植物等其他有胚植物,藓类植物具有特殊的结构和生理特征。 藓类植物没有真正的根系,只有主要用来固定植物体的假根(Rhizoids)。 藓类的茎中没有高度分化的维管束,而这正是其他有胚植物用来长距离运输水分和养分的结构。藓类的叶片通常由单层细胞构成,叶片表面没有可以帮助抵抗干旱的角质层,气孔无法闭合,它们没有叶柄而是叶片基部细胞直接附着在茎上。 藓类植物的这些特殊结构特征,决定了它们具有一些独特的生理生态特征。藓类能够通过体表直接高效吸收大气沉降养分。藓类还具有变水(Poikilohydric)的特性,即干旱时通过降低细胞或组织含水量而进入休眠状态,在水分充沛时能够迅速吸水恢复,堪称植物界的“三体人”。
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happyukgo | 0 | 7,750,353,524 | 46.69% | ||
nokeh | 0 | 72,065,608 | 46.69% | ||
robinlee | 0 | 192,341,427 | 46.69% | ||
pixelfan | 0 | 20,537,211,619 | 3.7% | ||
rainyapril | 0 | 197,661,802 | 46.69% | ||
kangnajiang | 0 | 65,981,666 | 46.69% | ||
kikima | 0 | 321,095,570 | 46.69% | ||
geass | 0 | 277,314,964 | 46.69% | ||
rosatravels | 0 | 306,203,290,797 | 46.69% | ||
superbing | 0 | 1,991,109,989 | 46.69% | ||
dailystats | 0 | 2,598,056,592 | 46.69% | ||
jianan | 0 | 8,674,072,322 | 46.69% | ||
daxiang | 0 | 77,230,390 | 46.69% | ||
anxin | 0 | 1,266,976,556 | 46.69% | ||
nean | 0 | 193,936,109 | 46.69% | ||
foodielifestyle | 0 | 11,816,618,584 | 46.69% | ||
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dailychina | 0 | 3,110,695,943 | 46.69% | ||
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ethanlee | 0 | 2,346,133,996 | 46.69% | ||
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deepthinking | 0 | 201,772,710 | 46.69% | ||
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ffbank | 0 | 31,734,057 | 46.69% | ||
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turtlegraphics | 0 | 1,211,690,710 | 46.69% | ||
witnesstools | 0 | 3,514,091,561 | 46.69% | ||
ilovecoding | 0 | 3,332,033,936 | 46.69% | ||
steemfuckeos | 0 | 1,636,235,272 | 46.69% | ||
hf20 | 0 | 34,838,674,193 | 100% | ||
xymmj | 0 | 350,582,086 | 100% | ||
limka | 0 | 137,005,912 | 100% | ||
blockcleaner | 0 | 12,659,838,909 | 46.69% | ||
steem-drivers | 0 | 93,662,683 | 20.5% | ||
cplusplus | 0 | 3,246,871,103 | 46.69% | ||
justsoso | 0 | 806,837,818 | 46.69% | ||
longhash | 0 | 738,407,609 | 46.69% | ||
llfestyle | 0 | 134,464,147 | 46.69% | ||
steem-holder | 0 | 1,672,855,728 | 16.5% | ||
maiydue | 0 | 0 | 46.69% | ||
myiord1992 | 0 | 0 | 46.69% | ||
sexybeach | 0 | 3,292,064,671 | 46.69% | ||
suckmydick | 0 | 1,617,522,156 | 46.69% | ||
chromebook | 0 | 1,560,782,746 | 46.69% | ||
ericandryan | 0 | 10,087,290,656 | 46.69% | ||
suckerpunk | 0 | 1,459,201,877 | 100% | ||
justyy222 | 0 | 1,582,381,304 | 46.69% |
拍拍
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