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Research Progress on Calcium Ion in Gametophytic Self-Incompatibility Cover

Research Progress on Calcium Ion in Gametophytic Self-Incompatibility

Journal of Horticultural Research
Volume 30 (2022): Issue 2 (December 2022)
By: Yanling Guo and  Haiyong Qu  
Open Access
|Nov 2022

Figures & Tables

Figure 1

Schematic diagram of the role of calcium ions in self-incompatibility(A) The role of Ca2+ in gametophytic self-incompatibility (GSI) in Papaveraceae. The incompatible pollen tube influxes a lot of extracellular Ca2+, which destroys the calcium ion gradient at the tip of the pollen tube. However, the Ca2+ gradient at the tip of the compatible pollen tube was not affected. The green solid arrow is Ca2+ flow direction. PT – pollen tube; PrpS – P. rhoeas pollen S determinant; PrsS – P. rhoeas stigma S. (B) The role of Ca2+ in the sporophytic self-incompatibility (SSI) in the Brassicaceae. ACA13 promotes extracellular Ca2+ into the compatible pollen tube. When incompatible pollination occurs, GLR regulates extra-cellular Ca2+ into stigma papilla cells. ACA13 – autoinhibited Ca2+-ATPase13; GLR – glutamate receptor-like channel
Schematic diagram of the role of calcium ions in self-incompatibility(A) The role of Ca2+ in gametophytic self-incompatibility (GSI) in Papaveraceae. The incompatible pollen tube influxes a lot of extracellular Ca2+, which destroys the calcium ion gradient at the tip of the pollen tube. However, the Ca2+ gradient at the tip of the compatible pollen tube was not affected. The green solid arrow is Ca2+ flow direction. PT – pollen tube; PrpS – P. rhoeas pollen S determinant; PrsS – P. rhoeas stigma S. (B) The role of Ca2+ in the sporophytic self-incompatibility (SSI) in the Brassicaceae. ACA13 promotes extracellular Ca2+ into the compatible pollen tube. When incompatible pollination occurs, GLR regulates extra-cellular Ca2+ into stigma papilla cells. ACA13 – autoinhibited Ca2+-ATPase13; GLR – glutamate receptor-like channel

Figure 2

Schematic diagram of calcium ion signal transduction process in S-RNase-based gametophytic self-incompatibility response(A) When compatible pollination occurs, the Ca2+ gradient in the pollen tube is not affected and promotes the transport of the vesicles to the tip. These vesicles contain S-RNase, and when the vesicles are fused with the tip cell membrane, the S-RNase is discharged outside the pollen tube so that the RNA cannot be degraded. (B) When incompatible pollination occurs, the activity of the tip Ca2+ channel in the pollen tube is inhibited and the tip Ca2+ gradient is destroyed. When the Ca2+ gradient is disrupted, the vesicles cannot be transported to the tip and rupture within the pollen tube, releasing S-RNase, which degrades the RNA when the concentration of S-RNase accumulates in the pollen tube to a certain level
Schematic diagram of calcium ion signal transduction process in S-RNase-based gametophytic self-incompatibility response(A) When compatible pollination occurs, the Ca2+ gradient in the pollen tube is not affected and promotes the transport of the vesicles to the tip. These vesicles contain S-RNase, and when the vesicles are fused with the tip cell membrane, the S-RNase is discharged outside the pollen tube so that the RNA cannot be degraded. (B) When incompatible pollination occurs, the activity of the tip Ca2+ channel in the pollen tube is inhibited and the tip Ca2+ gradient is destroyed. When the Ca2+ gradient is disrupted, the vesicles cannot be transported to the tip and rupture within the pollen tube, releasing S-RNase, which degrades the RNA when the concentration of S-RNase accumulates in the pollen tube to a certain level

j_johr-2022-0016_tab_001

ABPactin binding protein
ACA13autoinhibited Ca2+-ATPase13
CaMcalmodulin
CBLcalcineurin B-like protein
CDPKcalcium-dependent protein kinase
CIPKCBL-interacting protein kinase
CMLCaM-like
CRTcalreticulin gene
GLRglutamate receptor-like channel
GSIgametophytic self-incompatibility
MAPKmitogen-activated protein kinase
PrpSPapaver rhoeas stigma S determinant
PrsSPapaver rhoeas stigma S
ROSreactive oxygen species
SCRS-locus cysteine-rich protein
SFB/SLFS-haplotype-specific F-box/S-locus F-box
SIself-incompatibility
SP11S-locus protein 11
SRKS-locus receptor kinase
SSIsporophytic self-incompatibility
DOI: https://doi.org/10.2478/johr-2022-0016 | Journal eISSN: 2353-3978 | Journal ISSN: 2300-5009
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Language: English
Page range: 13 - 22
Submitted on: Mar 1, 2022
Accepted on: Sep 1, 2022
Published on: Nov 12, 2022
Published by: National Institute of Horticultural Research
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year
Keywords:
calcium,
pollen tube,
gametophytic self-incompatibility,
sporophytic self-incompatibility
Related subjects:
Life sciences,
Biotechnology,
Plant science,
Ecology,
Life sciences, other

© 2022 Yanling Guo, Haiyong Qu, published by National Institute of Horticultural Research
This work is licensed under the Creative Commons Attribution 4.0 License.

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