Histidine limitation alters plant development and influences the TOR network
Article
Guerin, Amandine, Levasseur, Caroline, Herger, Aline, Renggli, Dominik, Sotiropoulos, Alexandros, Kadler, Gabor, Hou, Xiaoyu, Schaufelberger, Myriam, Meyer, Christian, Wicker, Thomas, Bigler, Laurent and Ringli, Christoph. 2025. "Histidine limitation alters plant development and influences the TOR network." Journal of Experimental Botany. 76 (4), pp. 1085-1098. https://doi.org/10.1093/jxb/erae479
| Article Title | Histidine limitation alters plant development and influences the TOR network |
|---|---|
| ERA Journal ID | 2604 |
| Article Category | Article |
| Authors | Guerin, Amandine, Levasseur, Caroline, Herger, Aline, Renggli, Dominik, Sotiropoulos, Alexandros, Kadler, Gabor, Hou, Xiaoyu, Schaufelberger, Myriam, Meyer, Christian, Wicker, Thomas, Bigler, Laurent and Ringli, Christoph |
| Journal Title | Journal of Experimental Botany |
| Journal Citation | 76 (4), pp. 1085-1098 |
| Number of Pages | 14 |
| Year | 2025 |
| Publisher | Oxford University Press |
| Place of Publication | United Kingdom |
| ISSN | 0022-0957 |
| 1460-2431 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1093/jxb/erae479 |
| Web Address (URL) | https://academic.oup.com/jxb/article/76/4/1085/7926833 |
| Abstract | Plant growth depends on growth regulators, nutrient availability, and amino acid levels, all of which influence cell wall formation and cell expansion. Cell wall integrity and structures are surveyed and modified by a complex array of cell wall integrity sensors, including leucine-rich repeat (LRR)-extensins (LRXs) that bind RALF (rapid alkalinization factor) peptides with high affinity and help to compact cell walls. Expressing the Arabidopsis root hair-specific LRX1 without the extensin domain, which anchors the protein to the cell wall (LRX1 Delta E14), has a negative effect on root hair development. The mechanism of this negative effect was investigated by a suppressor screen, which led to the identification of a sune (suppressor of dominant-negative LRX1 Delta E14) mutant collection. The sune82 mutant was identified as an allele of HISN2, which encodes an enzyme essential for histidine biosynthesis. This mutation leads to reduced accumulation of histidine and an increase in several amino acids, which appears to have an effect on the TOR (target of rapamycin) network, a major controller of eukaryotic cell growth. It also represents an excellent tool to study the effects of reduced histidine levels on plant development, as it is a rare example of a viable partial loss-of-function allele in an essential biosynthetic pathway. Partial loss of function of HISN2 in sune82 results in a significant reduction in histidine content, which subsequently alters plant development and the TOR network. |
| Keywords | Amino acid metabolism; Arabidopsis; HISN2; histidine defciency; LRX1; LRX1ΔE14; root growth; root hair; sune82; TOR |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 310407. Host-parasite interactions |
| Byline Affiliations | University of Zurich, Switzerland |
| Paris-Saclay University, France |
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https://research.usq.edu.au/item/zx221/histidine-limitation-alters-plant-development-and-influences-the-tor-network
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