Getting physical: invasive growth events during plant development

Marsollier, Anne-Charlotte; Ingram, Gwyneth

doi:10.1016/j.pbi.2018.06.002

Cited by 18 publications

(18 citation statements)

References 67 publications

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“…5). This result was not completely unexpected since pollen tube growth has many similar cellular responses to pathogen attacks, for example invasive growth recognition of an external invader, cell wall digestion, calcium burst 8,46,47 . We suggest that plant responses to pollen and pathogens share conserved molecular mechanisms at early stages of the interactions but later downstream branches would lead to different reactions, one inhibiting the pathogen invasion, whereas the other would promote pollen tube growth in the pistil.…”

Section: Discussionmentioning

confidence: 83%

“…Although the role of mechanical signals and cell wall reorganization has been studied in growing pollen tubes in vitro 51–53 , very little is known about components involved in pollen tube penetration and elongation within the stigma. It seems likely that major cell wall modifications are necessary to allow pollen tube growth through softening and loosening of the cell matrix 48 . How the pollen tube and stigma papilla contribute to these changes is still unknown even though both male and female partners are likely to contribute.…”

Section: Discussionmentioning

confidence: 99%

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The molecular signatures of compatible and incompatible pollination

Kodera

Just

Rocha

et al. 2018

Preprint

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

The molecular signatures of compatible and incompatible pollination

Kodera

Just

Rocha

et al. 2018

Preprint

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“…To facilitate the penetration of the pollen tube into the pistil tissues, cell wall modification and softening and cell separation in pistil tissues is required (Marsollier and Ingram, 2018). Hydroxyproline-rich glycoproteins (HRGPs), such as leucinerich repeat extensins (LRXs), are localized at the pollen tube surface and in the intercellular matrix.…”

Section: Ros Trigger Downstream Responsesmentioning

confidence: 99%

“…Hydroxyproline-rich glycoproteins (HRGPs), such as leucinerich repeat extensins (LRXs), are localized at the pollen tube surface and in the intercellular matrix. It has been suggested that these proteins function to separate the cell walls of pistil tissues, by serving as lubricating functions for pollen tube growth in the pistil (Marsollier and Ingram, 2018;Sede et al, 2018). Stigmaspecific protein 1 (STIG1), a cysteine-rich protein expressed in pistil tissues in tobacco and petunia, promotes pollen tube growth (Verhoeven et al, 2005;Huang et al, 2014).…”

Section: Ros Trigger Downstream Responsesmentioning

confidence: 99%

ROS in the Male–Female Interactions During Pollination: Function and Regulation

Zhang

Gao

2020

Front. Plant Sci.

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The male-female interactions in pollination mediate pollen hydration and germination, pollen tube growth and fertilization. Reactive oxygen species (ROS) derived from both male and female tissues play regulatory roles for the communication between the pollen/ pollen tube and female tissues at various stages, such as pollen hydration and germination on the stigma, pollen tube growth in the pistil and pollen tube reception in the female gametophyte. In this minireview, we primarily summarize the recent progress on the roles of ROS signaling in male-female interactions during pollination and discuss several ROSregulated downstream signaling pathways for these interactions. Furthermore, several ROS-involved downstream pathways are outlined, such as Ca 2+ signaling, cell wall cytomechanics, the redox modification of CRP, and cell PCD. At the end, we address the roles of ROS in pollen tube guidance and fertilization as future questions that merit study.

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“…With few exceptions such as pollen tube and fiber cell growth (Gorshkova et al, 2012; Chebli and Geitmann, 2017; Marsollier and Ingram, 2018), cell-cell adhesion and thus symplastic growth is ubiquitous in developing plant organs. The presence of contiguous cell walls with a pectin-rich middle lamella maintains adhesion between adjacent cells (Jarvis et al, 2003) (Daher and Braybrook, 2015) Besides, many reports point at the high degree of growth heterogeneity in plant tissues (Hong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Conflicts in Twisting Growth Revealed by Cell-Cell Adhesion Defects

2019

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Many plants grow organs and tissues with twisted shapes. Arabidopsis mutants with impaired microtubule dynamics exhibit such a phenotype constitutively. Although the activity of the corresponding microtubule regulators is better understood at the molecular level, how large-scale twisting can emerge in the mutants remains largely unknown. Classically, oblique cortical microtubules would constrain the deposition of cellulose microfibrils in cells, and such conflicts at the cell level would be relaxed at the tissue scale by supracellular torsion. This model implicitly assumes that cell-cell adhesion is a key step to transpose local mechanical conflicts into a macroscopic twisting phenotype. Here we tested this prediction using the quasimodo1 mutant, which displays cell-cell adhesion defects. Using the spriral2/tortifolia1 mutant with hypocotyl helical growth, we found that qua1 -induced cell-cell adhesion defects restore straight growth in qua1-1 spr2-2 . Detached cells in qua1-1 spr2-2 displayed helical growth, confirming that straight growth results from the lack of mechanical coupling between cells rather than a restoration of SPR2 activity in the qua1 mutant. Because adhesion defects in qua1 depend on tension in the outer wall, we also showed that hypocotyl twisting in qua1-1 spr2-2 could be restored when decreasing the matrix potential of the growth medium, i.e., by reducing the magnitude of the pulling force between adjacent cells, in the double mutant. Interestingly, the induction of straight growth in qua1-1 spr2-2 could be achieved beyond hypocotyls, as leaves also displayed a flat phenotype in the double mutant. Altogether, these results provide formal experimental support for a scenario in which twisted growth in spr2 mutant would result from the relaxation of local mechanical conflicts between adjacent cells via global organ torsion.

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Getting physical: invasive growth events during plant development

Cited by 18 publications

References 67 publications

The molecular signatures of compatible and incompatible pollination

The molecular signatures of compatible and incompatible pollination

ROS in the Male–Female Interactions During Pollination: Function and Regulation

Mechanical Conflicts in Twisting Growth Revealed by Cell-Cell Adhesion Defects

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