2017年12月14日Molecular Plant在线文章，该文章为一篇spotlight，介绍了GA在调控植物生长和作物产量过程中多方面的功能。

原题目为：

To bring flowers or do a runner - GAs make the decision

图1. GA在控制植物生长和作物产量中多方面的功能。

GA可以直接或间接的控制植物发育的几个过程。在GA水平升高的情况下，DELLA降解，DELLA-GAF1复合物形成被抑制。这通过（1）和（2）减少GA的生物合成和促进生长而达到极致。同样，GAs可以通过DELLA降解或直接作用促进种子萌发（3）。根生长是由GAs直接促进，或通过HDT间接促进【HDT抑制GA2ox2表达，从而增加GAs水平】（4）。GAs还可以调控繁殖策略，提高植物产量，这种情况尤其出现在草莓和马铃薯中（5），因为高的GAs水平可以使腋芽分化为生殖性分支或匍匐茎。绿色箭头表示上调过程，红线条形线表示抑制过程。

Figure 1. The multifaceted functions of GA in controlling plant growth and crop yield. Gibberellin action controlling several processes in plant development can be either direct or indirect. Under elevated levels of GA, DELLA is degraded and thus DELLA-GAF1 complex formation is inhibited. This culminates with the reduction of the biosynthesis of GA and the promotion of growth via (1) and (2). Similarly, GAs promotes seed germination either through DELLA degradation or directly (3). Root growth is directly promoted by GAs or indirectly via HDT, which inhibits GA2ox2 expression and consequently increases GAs levels (4). GAs can also mediate the propagation decision and increase plant yield, particularly in strawberry and potato (5), given that high GAs levels allow axillary buds to differentiate in productive branches (fruits production) or stolon/runner (special branch that is propagative in strawberry and productive in potato). Green arrows show processes upregulation, whereas bar-ended red lines show process inhibition. Abbreviations: AXM: axillary meristem; GAF1: GAI-ASSOCIATED FACTOR1; PIF: PHYTOCHROME INTERACTING FACTORS; BZR: BRASSINAZOLE RESISTANT; DOF: DNA-BINDING ONE ZINC FINGER6; HDT: HISTONE DEACETYLASE, TPR: TOPLESS RELATED.

每日一词

culminate

英[ˈkʌlmɪneɪt]

美[ˈkʌlməˌnet]

vt. 达到极点;

[例句]They had an argument, which culminated in Tom getting drunk

他们争论了一番，最后汤姆喝醉了。

[其他] 第三人称单数：culminates 现在分词：culminating 过去式：culminated 过去分词：culminated