acropetal是什么意思   acropetal怎么读

acropetal单词基本解析：

acropetal变化用词：

acropetal英英释义：

1. of leaves or flowers; developing or opening in succession from base to apex

形容词 acropetal:

of leaves or flowers; developing or opening in succession from base to apexacropetal[ ə'krɔpitəl ]adj.of leaves or flowers; developing or opening in succession from base to apex

acropetal中文词源：

acropetal用法和例句：

acropetal

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鳞片的叶腋处产生，之后其由基部向顶部连续发生。

acropetal leaf

上生叶

See also acropetal;

参见acropetal;

acropetal development

向顶发育

acropetal translocation

向顶运输

acropetal succession

向顶顺序性

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.

向顶：描述植物器官生长或者发育的一个过程，这个过程是自下而上的，因此较年老的部分在底端，而幼小的部分在顶端。

acropetal coefficient

器官系数

Usually, two pairs of the fertile bracts in the middle of the cone subtend six ovules, which initiate in an acropetal manner.

在北京 ,雌球果原基 7月分化。 通常一个球果有 4对苞片 ,中部两对可育 ,靠球果顶端一对各产生一枚胚珠 ,其下一对各两枚。

acropetal differentiation of the cambium layer continues as the primary root elongates

形成层的向顶分化像初生根伸长一样在继续进行。

Compare acropetal.

比较acropetal。

In Aconitum inflorescences the oldest flowers were functionally female at the bottom of acropetal racemes, while younger flowers were functionally male at the upper positions.

草乌花序是无限花序, 当上部的花处于雄性阶段时, 下部的花正好处于雌性阶段。