© Marcel Baer

Genetic analysis of root system architecture

Although hidden in the ground and therefore often neglected, roots are important plant organs: they serve as anchorage, take up water and nutrients and interact with microbes in the soil. The root systems of cereals are complex, consisting of different root types formed at different stages of development. In recent years we have identified and studied mutants affected in various aspects of root development.

The different root types of maize are highlighted in distinct colors. Different classes of maize root mutants are defective in one or several of these root types (Hochholdinger et al. 2018).
© Hochholdinger

The different root types of maize are highlighted in distinct colors. Different classes of maize root mutants are defective in one or several of these root types (Hochholdinger et al. 2018).

In recent years, we cloned and characterized several key genes that shape the complex root system architecture of maize.

Molecular Function and Context of Proteins Associated with Maize Root Development (Hochholdinger et al. 2018)
© Hochholdinger

Molecular Function and Context of Proteins Associated with Maize Root Development (Hochholdinger et al. 2018).

Reviewes from our group on the genetic analysis of cereal root formation

Hochholdinger et al. (2018)  PubMed1
Yu et al. (2016)  PubMed2
Hochholdinger (2016)  PubMed3
Hochholdinger and Zimmermann (2009)  PubMed4
Hochholdinger and Tuberosa (2009)  PubMed5
Hochholdinger et al. (2004a)  PubMed6
Hochholdinger et al. (2004b)  PubMed7

Publications on mutants and genes controlling root formation in maize and barley

The maize rtcs and rtcl genes:
Xu et al. (2015)  PubMed8
Majer et al. (2012)  PubMed9
Taramino et al. (2007)  PubMed10
Hetz W et al. (1996)  Free article11

Transcriptomic analyses of rtcs:
Tai et al. (2017)  PubMed12
Yu et al. (2015)  PubMed13
Muthreich et al. (2013)  PubMed14

Proteomic analyses of rtcs:
Muthreich et al. (2010)  PubMed15
Sauer et al. (2006)  PubMed16

The maize lrt1 gene:
Baer et al. (2023)  PubMed17
Husakova et al (2013)  PubMed18
Hochholdinger and Feix (1998)  Free article19

The maize rum1 and rul1 genes:
Zhang et al. (2016)  PubMed20
Zhang et al. (2014)  PubMed21
Von Behrens et al. (2011)  PubMed22
Woll et al. (2005)  PubMed23

Proteomic analysis of rum1:
Liu et al. (2010)  PubMed24
Liu et al. (2006)  PubMed25

The maize rth1 gene:
Wen et al. (2005)  PubMed26

The maize rth3 gene:
Hochholdinger et al. (2008)  PubMed27

The maize rth5 gene:
Nestler et al. (2014)  PubMed28

The maize rth6 gene:
Li et al. (2016)  PubMed29

The maize root hair proteome:
Nestler et al. (2011)  PubMed30

The maize root hair transcriptome:
Hey et al. (2017)  PubMed31

The root growth angle defines how roots grow toward the gravity vector and is among the most important determinants of root system architecture. It controls water uptake capacity, nutrient use efficiency, stress resilience, and, as a consequence, yield of crop plants. We cloned and characterized barley genes which control the root angle and display steeper roots upon mutation.

The egt2 gene of barley:
Guo et al. (2023)  PubMed32
Kirschner et al. (2021)  PubMed33

The egt1 gene of barley:
Fusi et al. (2022)  PubMed34

Contact

Avatar Hochholdinger

Prof. Dr. Frank Hochholdinger

Website35

+49 228 73-60334

© Barbara Frommann/ University of Bonn

Co-workers

Avatar Baer

Dr. Marcel Baer

Website36

+49 228 73-60554

© Barbara Frommann/ University of Bonn
Avatar Guo

Dr. Li Guo

Website37

+49 228 73-60551

© Li Guo

Links

  1. https://www.ncbi.nlm.nih.gov/pubmed/29170008
  2. https://www.ncbi.nlm.nih.gov/pubmed/27524642
  3. https://pubmed.ncbi.nlm.nih.gov/27493225/
  4. https://pubmed.ncbi.nlm.nih.gov/18006363/
  5. http://www.ncbi.nlm.nih.gov/pubmed/19157956
  6. http://www.ncbi.nlm.nih.gov/pubmed/14980975
  7. http://www.ncbi.nlm.nih.gov/pubmed/14729218
  8. http://www.ncbi.nlm.nih.gov/pubmed/?term=Cooperative+action+of+the+paralogous+maize+LOB+domain+proteins+RTCS+and+RTCL+in+shoot-borne+root+formation
  9. http://www.ncbi.nlm.nih.gov/pubmed/22527397
  10. https://www.ncbi.nlm.nih.gov/pubmed/17425722
  11. http://onlinelibrary.wiley.com/doi/10.1046/j.1365-313X.1996.10050845.x/pdf
  12. https://www.ncbi.nlm.nih.gov/pubmed/28204533
  13. https://www.ncbi.nlm.nih.gov/pubmed/26346717
  14. https://www.ncbi.nlm.nih.gov/pubmed/23843603
  15. http://www.ncbi.nlm.nih.gov/pubmed/19962210
  16. http://www.ncbi.nlm.nih.gov/pubmed/16521151
  17. https://pubmed.ncbi.nlm.nih.gov/36345913/
  18. https://www.ncbi.nlm.nih.gov/pubmed/23456690
  19. http://onlinelibrary.wiley.com/doi/10.1046/j.1365-313x.1998.00280.x/pdf
  20. https://www.ncbi.nlm.nih.gov/pubmed/26672614
  21. https://www.ncbi.nlm.nih.gov/pubmed/24928984
  22. http://www.ncbi.nlm.nih.gov/pubmed/21219511
  23. http://www.ncbi.nlm.nih.gov/pubmed/16215225
  24. http://www.ncbi.nlm.nih.gov/pubmed/19962783
  25. http://www.ncbi.nlm.nih.gov/pubmed/16819721
  26. http://www.ncbi.nlm.nih.gov/pubmed/15980192
  27. http://www.ncbi.nlm.nih.gov/pubmed/18298667
  28. http://www.ncbi.nlm.nih.gov/pubmed/?term=Nestler+J.%2C+Liu+S.%2C+Wen+T.-J.%2C+Paschold+A.%2C+Marcon+C.%2C+Tang+H.M.%2C+Li+D.%2C+Li+L.%2C+Meeley+R.%2C+Sakai+H.%2C+Bruce+W.%2C+Schnable+P.S.%2C+Hochholdinger+F.+%282014%29%29
  29. 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  34. https://pubmed.ncbi.nlm.nih.gov/35881796/
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