From anecdotal observation, both Senecio jacobea and S. erucifolius, occur in open herbaceous vegetation on dry, calcareous substrate, in coastal dunes, quarries and riverine grassland, all places were trees/shrubs cannot easily establish a closed canopy for different reasons.  Extensification, planned or unintended, of riverine pasture, meadow or road verges in the presence of the species may results in a spectacularly colorful 'invasion'. Low grazing density may further enhance the invasion. 

Arbuscular Mycorrhizal Fungi as Natural Biofertilizers. so yes

I wish you success

See

www.agr.gc.ca/.../les-champignons-mycorhiziens-arbusculaires-et-leur-symbiose-vege... 

11 juil. 2013 -

L'étude de fossiles du Dévonien supérieur a révélé que les mycorhizes arbusculaires(CMA) existaient avant même l'apparition des plantes ...

I agree.

Hi Dr.Johann

Some useful references 1

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwi284nM07nbAhUNYlAKHZvSA4YQFgg6MAM&url=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC4717633%2F&usg=AOvVaw3hhh-1CtqdThlI5m6Kls4y

2

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwi284nM07nbAhUNYlAKHZvSA4YQFghfMAs&url=http%3A%2F%2Fwww.scielo.br%2Fscielo.php%3Fscript%3Dsci_arttext%26pid%3DS0100-06832010000300018&usg=AOvVaw2T8N0mBWLdKpNikm-6rRiE

3

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwi284nM07nbAhUNYlAKHZvSA4YQFghpMAw&url=https%3A%2F%2Fwww.pubfacts.com%2Fsearch%2FMycorrhizal%2Bdependency&usg=AOvVaw0epMilB_IJ6SYMV07YSZFg

4

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwi284nM07nbAhUNYlAKHZvSA4YQFghrMA0&url=https%3A%2F%2Fagupubs.onlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1111%2Fj.1469-8137.2004.01159.x&usg=AOvVaw3u_TEag4Xulw1LNp6GHQKJ

5

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwi284nM07nbAhUNYlAKHZvSA4YQFghtMA4&url=https%3A%2F%2Faslopubs.onlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1111%2Fj.1469-8137.2009.02920.x&usg=AOvVaw1KCtvhq5jo0RBZR5_hgtb_

6

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&cad=rja&uact=8&ved=0ahUKEwiWwqq-1LnbAhXIbVAKHf6-ArA4ChAWCCYwAA&url=https%3A%2F%2Fwww.scoop.it%2Ft%2Fplant-microbe-symbioses%2Fp%2F4093451856%2F2018%2F01%2F28%2Fpathways-of-nitric-oxide-metabolism-and-operation-of-phytoglobins-in-legume-nodules-missing-links-and-future-directions&usg=AOvVaw0-ovC_KhKmOiSsrYUPILu5

7

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwiWwqq-1LnbAhXIbVAKHf6-ArA4ChAWCCgwAQ&url=https%3A%2F%2Fwww.scoop.it%2Ft%2Fplant-microbe-symbioses%2Fp%2F4094016145%2F2018%2F02%2F11%2Fstudying-the-biochemical-function-of-the-pea-receptor-like-kinases-sym10-sym37-and-k1-required-for-the-legume-rhizobia-symbiosis-development&usg=AOvVaw3bVUNK2q7pDsm89h707jJM

8

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwiWwqq-1LnbAhXIbVAKHf6-ArA4ChAWCDIwBA&url=https%3A%2F%2Frepository.lib.ncsu.edu%2Fbitstream%2Fhandle%2F1840.16%2F5186%2Fetd.pdf%3Fsequence%3D1&usg=AOvVaw3YbBt5xTh-PoHmqlC8t9xD

9

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=16&cad=rja&uact=8&ved=0ahUKEwiWwqq-1LnbAhXIbVAKHf6-ArA4ChAWCDcwBQ&url=http%3A%2F%2Fwww.nrcresearchpress.com%2Fdoi%2Fpdf%2F10.1139%2Fb04-911&usg=AOvVaw0Ht86excgDXf_kwHhk6_T3

10

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=17&cad=rja&uact=8&ved=0ahUKEwiWwqq-1LnbAhXIbVAKHf6-ArA4ChAWCDkwBg&url=http%3A%2F%2Fwww.uni-giessen.de%2F~gh1748%2Fprogramme_Dateien%2Fpdf_files%2FProceedings_of_the_GfOE_2004.pdf&usg=AOvVaw0DWxrcWY1Ln-FY0OwNxtKT

11

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFghLMAs&url=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC4717633%2F&usg=AOvVaw3hhh-1CtqdThlI5m6Kls4y

12

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFghdMAw&url=http%3A%2F%2Fjournals.plos.org%2Fplosone%2Farticle%3Fid%3D10.1371%2Fjournal.pone.0027825&usg=AOvVaw36xfXYdZuiwOlh0JhOGY9L

13

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFghoMA0&url=http%3A%2F%2Fweb.science.uu.nl%2Fpmi%2Fpublications%2FPDF%2F2012%2FProefschrift-Lopes-da-Veiga-2012.pdf&usg=AOvVaw0jbi6g3ns5mcRPKJwnLP45

14

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFghvMA4&url=http%3A%2F%2Fscholarworks.umt.edu%2Fcgi%2Fviewcontent.cgi%3Farticle%3D10416%26context%3Detd&usg=AOvVaw0g_m5OgZR-JzjjBighxRGJ

15

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=16&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFgh0MA8&url=https%3A%2F%2Fpbsociety.org.pl%2Fjournals%2Findex.php%2Fasbp%2Farticle%2FviewFile%2Fasbp.2008.019%2F252&usg=AOvVaw2E-2Zw0Mht8ftvz1FQdDdq

16

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=17&cad=rja&uact=8&ved=0ahUKEwi8272O1bnbAhXIaVAKHaKuBX0QFgh9MBA&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.889.3916%26rep%3Drep1%26type%3Dpdf&usg=AOvVaw0hBQhSV-gTEmdwS9C15r0l

17

https://repository.lib.ncsu.edu/bitstream/handle/1840.16/5186/etd.pdf?sequence=1

18

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwivqeLv1bnbAhUBfFAKHYNNAi04ChAWCCswAQ&url=http%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2F10.1111%2F1365-2435.12056%2Ffull&usg=AOvVaw0Dczt19dvuL1Qu4IOAC_Kt

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwivqeLv1bnbAhUBfFAKHYNNAi04ChAWCDEwAg&url=https%3A%2F%2Fwww.cabi.org%2Fisc%2Fdatasheet%2F49558&usg=AOvVaw1gkyzdjFkbNVE_PwP7bCT4