這個是原文摘要和第一段，是發(fā)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).

這是我粗略的翻譯，
最近研究表明，大量mRNA能通過篩分子運送在植物器官之間，并且被認為是可能的遠距離信號分子。然而，選擇用于運輸?shù)霓D錄本的機制尚未確定。通過轉錄豐度和半衰期可以解釋實驗中擬南芥的基因遷移。這表明，基因從伴胞進入篩分子的非序列特異性運動可以解釋大多數(shù)確定的轉錄本遷移現(xiàn)象。

適應環(huán)境條件對植物來說是至關重要的。在整株水平上，是通過長距離信號在各器官之間實現(xiàn)，這對植物的生長發(fā)育和防御反應尤為重要（Shah and Zeier, 2013; Sparks et al., 2013）。長距離通信機制包括鈣和活性氧波，動作電位，液壓波，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)。長距離的信號分子可以通過韌皮部運輸，也就是由去核細胞組成的篩管。mRNA也能夠在篩管中移動，一些移動轉錄本被證明可以引起遠端位置的發(fā)展差異(Spiegelman et al., 2013)，這讓人聯(lián)想到mRNA可能是另一種遠距離的信號分子(Westwood, 2015)。


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