http://plantas-y-flores.blogspot.com/
Some cut flowers and pot plants last longer than others, ie, they slow the aging process, known as senescence. Scientists at the Agricultural Research Service U.S. (ARS) scientists are studying how to help prolong the beauty of flowers, analyzing the genetic mechanisms that control aging in plants.
One option is called virus induced gene silencing (VIGS by its acronym in English), which allows researchers to determine the role of genes in old plants. In the laboratory, the scientists used a virus snuff rattlesnake, which was modified by inserting genes from plants of interest. In the experiments, some plants in bloom received no exposure to the virus, others are exposed to the virus to other conventional and modified.
Exposure stimulates the natural defense mechanisms of the plant, including attempts to silence the virus. When this occurs, the introduced genes in the modified virus was also muted. Comparing all plants, it is possible that researchers can determine the functions of genes silenced again.
In previous experiments, the researchers used as a model plant Petunia. It was found that the virus by inserting a piece of a gene that gives color, the flower obtained (which would normally be purple) have white spots. The system of plant defense silenced the normal function of the gene, s say, the creation of color.
A second gene fragment inserted into the virus also was silenced in plants with flowers with white spots. That gene was silenced the function of producing ethylene, which is a composite of aging. It was found that plants with white spots exposed to modified virus produced less ethylene than unexposed plants or plants exposed to the unmodified virus.
Although VIGS has been used in other studies related to the functions of genes in tomato and snuff, the experiments of these researchers were the first to cut flowers and potted plants produced commercially.
http://plantas-y-flores.blogspot.com/
有些切花和盆栽植物比別人更長，也就是說，它們減緩老化過程，稱為衰老。科學家在美國農業研究服務（ARS）科學家正在研究如何幫助延長花的美麗，分析的遺傳機制，控制老化的植物。
辦法之一是所謂的病毒誘導的基因沉默（VIGS誘導其英文縮寫），這使得研究人員能夠確定基因的作用，在老廠。在實驗室中，科學家使用病毒鼻煙響尾蛇，這是插入基因改性植物的興趣。在實驗中，一些植物開花收到任何接觸病毒，其他人接觸到病毒的其他傳統和修改。
曝光刺激的自然防禦機制的植物，包括試圖保持沉默的病毒。當發生這種情況，介紹了修改後的病毒基因也靜音。所有植物比較，它有可能研究人員可確定的功能基因沉默了。
在以前的實驗中，研究人員利用作為模式植物矮牽牛。結果發現，該病毒通過插入一塊的基因，讓色彩，花獲得（這通常是紫色）有白色斑點。該系統的植物防禦沉默的正常功能的基因，讓我們說，創造的顏色。
第二個基因片段插入到病毒也被壓制在植物的花有白色斑點。這種基因是沉默的生產乙烯的功能，它是一個複合的老化。研究發現，植物與白色斑點病毒暴露在修訂少乙烯生產比未暴露的植物或植物暴露在未修改的病毒。
雖然 VIGS誘導已用於其他研究相關的功能基因在番茄和鼻煙，實驗，這些研究人員首次對切花和盆栽植物生產商。
