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鳞枝是菹草抵御不良生境的一种延存器官。当环境中的pH、光照、营养盐等偏离正常值时,均可促进鳞枝的形成,但高pH的作用特别突出。 刚形成的鳞枝都有一个自发休眠期。休眠时间的长短依水温、光照而不同,在水温22～25℃有光照的条件下约为50天;高温(>30℃)、无光会延长其休眠期,低温(13℃)和红光刺激可使休眠期缩短。休眠期已满的鳞枝在水温2～35℃、pH3～10、盐度<11‰的环境中,无论光照条件如何均可萌发。
The scales branch is a kind of storage organ that the weeds resist bad habitat. When the environment pH, light, nutrients deviate from the normal value, can promote the formation of the branch, but the role of high pH is particularly prominent. The newly formed scales have a spontaneous dormant period. The duration of dormancy depends on water temperature and light, and it is about 50 days when the water temperature is between 22 and 25 ℃. The high temperature (> 30 ℃) prolonged dormancy, low temperature (13 ℃) and red light Stimulation can shorten the dormant period. The branches with full dormancy can germinate in the environment of water temperature 2 ~ 35 ℃, pH3 ~ 10, salinity <11 ‰, irrespective of light conditions.