TY - JOUR

T1 - Mechanical Stimulation Decreases Auxin and Gibberellic Acid Synthesis but Does Not Affect Auxin Transport in Axillary Buds

T2 - It Also Stimulates Peroxidase Activity in Petunia × atkinsiana

AU - Jędrzejuk, Agata

AU - Kuźma, Natalia

AU - Orłowski, Arkadiusz

AU - Budzyński, Robert

AU - Gehl, Christian

AU - Serek, Margrethe

N1 - Funding Information: This work was partly supported by the Incubator of Innovation 4.0 (grant supported by the Ministry of Higher Education, Poland) and DAAD grant no. 57552347. Funding Information: A.J. conceived this project and designed the experiments; N.K., R.B., C.G. and A.O. carried out the experiments and analyzed the data; M.S. partially supported project financing within the frames of the DAAD grant. All authors have read and agreed to the published version of the manuscript.

PY - 2023/3/17

Y1 - 2023/3/17

N2 - Thigmomorphogenesis (or mechanical stimulation-MS) is a term created by Jaffe and means plant response to natural stimuli such as the blow of the wind, strong rain, or touch, resulting in a decrease in length and an increase of branching as well as an increase in the activity of axillary buds. MS is very well known in plant morphology, but physiological processes controlling plant growth are not well discovered yet. In the current study, we tried to find an answer to the question if MS truly may affect auxin synthesis or transport in the early stage of plant growth, and which physiological factors may be responsible for growth arrest in petunia. According to the results of current research, we noticed that MS affects plant growth but does not block auxin transport from the apical bud. MS arrests IAA and GA3 synthesis in MS-treated plants over the longer term. The main factor responsible for the thickening of cell walls and the same strengthening of vascular tissues and growth arrestment, in this case, is peroxidase (POX) activity, but special attention should be also paid to AGPs as signaling molecules which also are directly involved in growth regulation as well as in cell wall modifications.

AB - Thigmomorphogenesis (or mechanical stimulation-MS) is a term created by Jaffe and means plant response to natural stimuli such as the blow of the wind, strong rain, or touch, resulting in a decrease in length and an increase of branching as well as an increase in the activity of axillary buds. MS is very well known in plant morphology, but physiological processes controlling plant growth are not well discovered yet. In the current study, we tried to find an answer to the question if MS truly may affect auxin synthesis or transport in the early stage of plant growth, and which physiological factors may be responsible for growth arrest in petunia. According to the results of current research, we noticed that MS affects plant growth but does not block auxin transport from the apical bud. MS arrests IAA and GA3 synthesis in MS-treated plants over the longer term. The main factor responsible for the thickening of cell walls and the same strengthening of vascular tissues and growth arrestment, in this case, is peroxidase (POX) activity, but special attention should be also paid to AGPs as signaling molecules which also are directly involved in growth regulation as well as in cell wall modifications.

KW - cell wall lignification

KW - plant architecture

KW - plant hormone synthesis

KW - thigmomorphogenesis

UR - http://www.scopus.com/inward/record.url?scp=85151362415&partnerID=8YFLogxK

U2 - 10.3390/molecules28062714

DO - 10.3390/molecules28062714

M3 - Article

AN - SCOPUS:85151362415

VL - 28

JO - MOLECULES

JF - MOLECULES

SN - 1420-3049

IS - 6

M1 - 2714

ER -