Editing Plant hormone (section)

===Strigolactones===
[[File:5-Deoxystrigol chemical structure.png|thumb|[[5-deoxystrigol]], a [[strigolactone]]|155px]]
[[Strigolactone]]s (SLs) were originally discovered through studies of the germination of the parasitic weed [[Striga asiatica|''Striga lutea'']]. It was found that the germination of ''Striga'' species was stimulated by the presence of a compound [[Exudate|exuded]] by the roots of its host plant.<ref>{{cite journal | vauthors = Xie X, Yoneyama K, Yoneyama K | title = The strigolactone story | journal = Annual Review of Phytopathology | volume = 48 | issue = 1 | pages = 93–117 | date = 2010-07-01 | pmid = 20687831 | doi = 10.1146/annurev-phyto-073009-114453 | s2cid = 27305711 }}</ref> It was later shown that SLs that are exuded into the soil also promote the growth of [[Symbiosis|symbiotic]] [[arbuscular mycorrhiza]]l (AM) fungi.<ref>{{cite journal | vauthors = Akiyama K, Matsuzaki K, Hayashi H | title = Plant sesquiterpenes induce hyphal branching in arbuscular mycorrhizal fungi | journal = Nature | volume = 435 | issue = 7043 | pages = 824–7 | date = June 2005 | pmid = 15944706 | doi = 10.1038/nature03608 | bibcode = 2005Natur.435..824A | s2cid = 4343708 }}</ref> More recently, another role of SLs was identified in the inhibition of shoot branching.<ref>{{cite journal | vauthors = Gomez-Roldan V, Fermas S, Brewer PB, Puech-Pagès V, Dun EA, Pillot JP, Letisse F, Matusova R, Danoun S, Portais JC, Bouwmeester H, Bécard G, Beveridge CA, Rameau C, Rochange SF | display-authors = 6 | title = Strigolactone inhibition of shoot branching | journal = Nature | volume = 455 | issue = 7210 | pages = 189–94 | date = September 2008 | pmid = 18690209 | doi = 10.1038/nature07271 | bibcode = 2008Natur.455..189G | s2cid = 205214618 }}</ref> This discovery of the role of SLs in shoot branching led to a dramatic increase in the interest in these hormones, and it has since been shown that SLs play important roles in [[Plant senescence|leaf senescence]], [[phosphate]] starvation response, salt tolerance, and light signalling.<ref>{{cite journal | vauthors = Saeed W, Naseem S, Ali Z | title = Strigolactones Biosynthesis and Their Role in Abiotic Stress Resilience in Plants: A Critical Review | journal = Frontiers in Plant Science | volume = 8 | pages = 1487 | date = 2017-08-28 | pmid = 28894457 | pmc = 5581504 | doi = 10.3389/fpls.2017.01487 | doi-access = free }}</ref>