Control of Plant Organ Size

Anastasiou, Elena; Lenhard, Michael

doi:10.1007/7089_2007_149

Cited by 7 publications

(9 citation statements)

References 101 publications

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“…In fact, after cell proliferation gradually ceases, postmitotic cells begin to expand (Anastasiou and Lenhard 2008). In addition, cell proliferation is also coupled with a limited amount of cell expansion during the proliferation phase (Anastasiou and Lenhard 2008). We speculated that AtEXP10 and AtGRF1 promotes cell expansion following a significant increase in cell proliferation.…”

Section: Discussionmentioning

confidence: 94%

“…However, our histological results showed that there was no obvious difference in cell size between 35S:BrARGOS transgenic Arabidopsis plants and the vector control plants. In fact, after cell proliferation gradually ceases, postmitotic cells begin to expand (Anastasiou and Lenhard 2008). In addition, cell proliferation is also coupled with a limited amount of cell expansion during the proliferation phase (Anastasiou and Lenhard 2008).…”

Section: Discussionmentioning

confidence: 97%

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Ectopic expression of a Chinese cabbage BrARGOS gene in Arabidopsis increases organ size

Bao

Zhou

et al. 2009

Transgenic Res

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Chinese cabbage (Brassica rapa L. ssp. pekinensis) is a common and economically important crop in Asia. Specific targets of plant breeding programs for cabbage have been improvement in yield, resistance to environment stresses, and nutrition quality by means of genetic manipulation. To obtain information on yield improvement applicable for the genetic engineering approach, we have attempted to dissect the molecular pathways that regulate organ size. We first isolated a putative homolog of ARGOS full-length cDNA from Chinese cabbage leaves, which we designated BrARGOS. At the transcription level, BrARGOS was detected in all organs tested in Chinese cabbage. To test the function of this gene, we then engineered Arabidopsis plants that would overexpress BrARGOS ectopically. The organs of the transgenic Arabidopsis plants were significantly larger than those of the control plants. This increase in size was due to enhanced cell proliferation, with no contribution from cell expansion. The molecular analysis revealed that overexpression of BrARGOS up-regulated the transcription of several genes involved in the control of organ size. These results suggest that the BrARGOS gene may function as one of the regulators of organ size in Chinese cabbage. As such, manipulation of the BrARGOS gene may significantly increase the size of Chinese cabbage organs, such as Chinese cabbage heads.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 97%

Ectopic expression of a Chinese cabbage BrARGOS gene in Arabidopsis increases organ size

Bao

Zhou

et al. 2009

Transgenic Res

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“…This is probably because meristematic competence is disrupted locally, cell division gradually ceases and differentiation begins with the expansion of the postmitotic cells 19 . In addition, cell proliferation is also coupled with a limited amount of cell expansion during the proliferation phase 54 . Therefore, we speculate that the extensin and expansin proteins promote cell expansion following a significant increase of cell proliferation.…”

Section: Discussionmentioning

confidence: 99%

Ectopic expression of a Brassica rapa AINTEGUMENTA gene (BrANT-1) increases organ size and stomatal density in Arabidopsis

Ding

Cui

et al. 2018

Sci Rep

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The AINTEGUMENTA-like (AIL) family plays a central role in regulating the growth and development of organs in many plants. However, little is known about the characteristics and functions of the AIL family in Chinese cabbage (Brassica rapa L. ssp. pekinensis). In this study, a genome-wide analysis was performed to identify the members of the AIL family in Chinese cabbage. We identified three ANT genes and six ANT-like genes of Chinese cabbage, most of which were differentially expressed in different organs or tissues. Furthermore, compared with the wild-type line, the size of different organs in the 35S-BrANT-1 line was significantly increased by promoting cell proliferation. Meanwhile, over-expression of BrANT-1 also increases the stomatal number and delays the leaf senescence. Transcriptome analyses revealed that a set of cell proliferation and stoma development genes were up-regulated, while the senescence-associated genes were down-regulated, suggesting these genes may be involved in BrANT-1 regulated processes for controlling organ size, stomatal density and leaf senescence. In summary, this study offers important insights into the characteristics and functions of the ANT genes in Chinese cabbage, and provides a promising strategy to improve yield or head size in Chinese cabbage breeding programs.

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“…Cell expansion is regulated by such genes as AtEXP10, AtGRF1, ARL, BPEp [3,4]. Cell proliferation is also tightly geneti cally controlled, as was originally shown in a model plant Arabidopsis thaliana, by up and down regulation of expression of genes in question [1]. The genes AINTEGUMENTA (ANT), ARGOS [5], CYCLIND3;1 [6], AN3/GIF1 [7], WUSCHEL, CLAVATA3 [8], and many others are involved in the regulation of cell division.…”

Section: Introductionmentioning

confidence: 98%

“…Plant organ size is con trolled by two basic mechanisms, namely the regula tion of cell division and cell expansion. At the first stage of organ development, called proliferation, cells divide and the cytoplasm mass accumulates [1]. Then the cell division processes are gradually being replaced by the expansion processes, when cells start enlarging and the central vacuole rapidly uptakes water.…”

Section: Introductionmentioning

confidence: 99%

Obtaining transgenic tobacco plants expressing conserved regions of the AINTEGUMENTA gene in antisense orientation

Kuluev

Knyazev

Lebedev

et al. 2012

Russ J Plant Physiol

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The AINTEGUMENTA gene encodes a transcription factor involved in the regulation of growth of both reproductive and vegetative plant organs. Two conserved regions of this gene were amplified and cloned in antisense orientation. The produced genetic constructs were used to obtain transgenic tobacco plants with the AINTEGUMENTA gene expression downregulated. Over half of the transgenic plants were characterized by smaller leaves, stems, and flowers with their shapes and symmetry not changed. The transgenic plants ceased to grow earlier, flowered later, and had fewer flowers than controls. The main reason for smaller organs was shown to be the lower cell number in an organ with cell sizes unchanged. The genetic constructs can be used to obtain transgenic plants of various species with smaller organs.

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Control of Plant Organ Size

Cited by 7 publications

References 101 publications

Ectopic expression of a Chinese cabbage BrARGOS gene in Arabidopsis increases organ size

Ectopic expression of a Chinese cabbage BrARGOS gene in Arabidopsis increases organ size

Ectopic expression of a Brassica rapa AINTEGUMENTA gene (BrANT-1) increases organ size and stomatal density in Arabidopsis

Obtaining transgenic tobacco plants expressing conserved regions of the AINTEGUMENTA gene in antisense orientation

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