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acropetal adj.【植物;植物學】向頂的。adv.-ly

acrophobia

Acropetal describing a process ( such as growth or development ) that progresses from the base or boint of attachment , so that the oldest parts are at the base and the youngest are at the tip 向頂:描述植物器官生長或者發育的一個過程,這個過程是自下而上的,因此較年老的部分在底端,而幼小的部分在頂端。

In the early december , the first bract primordium was formed in the axil scale at the cone base , then bract initiation had occurred in acropetal direction 12月初,最初的苞片原基在雌球果原基的鱗片的葉腋處產生,之后其由基部向頂部連續發生。

Acropetal differentiation of the cambium layer continues as the primary root elongates . 形成層的向頂分化像初生根伸長一樣在繼續進行。