这个是原文摘要和第一段，是发表在the plant cell上的
Recently, a large population of messenger RNA (mRNA) was shown to be able to travel between plant organs via sieve elements as a putative long-distance signalling molecule. However, a mechanistic basis by which transcripts are selected for transport has not yet been identified. Here we show that experimental mRNA mobility data in Arabidopsis can be explained by transcript abundance and half-life. This suggests that the majority of identified mobile transcripts can be accounted for by non-sequence-specific movement of mRNA from companion cells into sieve elements.

Acclimation to environmental conditions is vital for plants. At the whole-plant level, this is aided by long distance signalling between organs, which is important both for plant development and defence responses (Shah and Zeier, 2013; Sparks et al., 2013). Mechanisms for long distance communication include calcium and ROS waves, action potentials, and hydraulic waves, as well as phytohormones and some small RNAs (Shah and Zeier, 2013; Sparks et al., 2013; Gilroy et al., 2014). Long-distance signalling molecules can be transported through the phloem, in enucleated cells called sieve elements. mRNA is also able to move in sieve elements, and some mobile transcripts have been shown to give rise to developmental differences at distal locations (Spiegelman et al., 2013), leading to the suggestion that mRNA could be another class of long distance signalling molecules (Westwood, 2015).

这是我粗略的翻译，
最近研究表明，大量mRNA能通过筛分子运送在植物器官之间，并且被认为是可能的远距离信号分子。然而，选择用于运输的转录本的机制尚未确定。通过转录丰度和半衰期可以解释实验中拟南芥的基因迁移。这表明，基因从伴胞进入筛分子的非序列特异性运动可以解释大多数确定的转录本迁移现象。

适应环境条件对植物来说是至关重要的。在整株水平上，是通过长距离信号在各器官之间实现，这对植物的生长发育和防御反应尤为重要（Shah and Zeier, 2013; Sparks et al., 2013）。长距离通信机制包括钙和活性氧波，动作电位，液压波，以及植物激素和一些小分子RNA(Shah and Zeier, 2013; Sparks et al., 2013; Gilroy et al., 2014)。长距离的信号分子可以通过韧皮部运输，也就是由去核细胞组成的筛管。mRNA也能够在筛管中移动，一些移动转录本被证明可以引起远端位置的发展差异(Spiegelman et al., 2013)，这让人联想到mRNA可能是另一种远距离的信号分子(Westwood, 2015)。


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