The Role of Aspterric Acid in Auxin-Regulated Reproductive Growth of Arabidopsis thaliana

Application of 100 μm aspterric acid (AA), a pollen growth inhibitor, with different concentrations of indole-3-acetic acid (IAA) results in the recovery of normal pollen development of Arabidopsis thaliana. Treatment with 100 μm AA plus 5 mm IAA significantly induced the normal seed production. Treatment with 100 μm N-1-naphthylphthalamic acid (NPA), a polar auxin transport inhibitor, did not reduce the pollen growth but inhibited seed production. 100 μm NPA plus 5 mm IAA did not induce any seed production. The endogenous level of IAA in stems and leaves of A. thaliana treated with 100 μm AA was similar to that of the untreated control. In contrast to AA treatment, the IAA level by the treatment with 100 μm NPA was about twice as much as that of the untreated control. These results suggest that AA affects the Arabidopsis reproductive growth without inhibiting IAA biosynthesis and transport.

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Interaction between Aspterric Acid and Indole-3-acetic Acid on Reproductive Growth in Arabidopsis thaliana

Zeitschrift für Naturforschung C ◽

10.1515/znc-2005-7-810 ◽

2005 ◽

Vol 60 (7-8) ◽

pp. 572-576 ◽

Cited By ~ 5

Author(s):

Atsumi Shimada ◽

Hisakazu Yamane ◽

Yasuo Kimura

Keyword(s):

Arabidopsis Thaliana ◽

Acetic Acid ◽

Pollen Development ◽

Growth Inhibitor ◽

Stem Length ◽

Flower Bud ◽

Reproductive Growth ◽

Normal Pollen ◽

Pollen Growth ◽

Indole 3 Acetic Acid

Application of indole-3-acetic acid (IAA) with a pollen growth inhibitor, aspterric acid (AA), results in the recovery of normal pollen development. In contrast, application of gibberellin (GA3) with AA do not induce normal pollen growth. In addition, application of different concentrations of IAA with AA shortens the period of growth from bolting to first flowering as compared to that treated with AA alone. Furthermore, stem length and number of flower bud treated with IAA and AA were similar to those of control. These results suggest, that IAA may play an important role in reproductive growth of A. thaliana.

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Role of mature leaves in inhibition of root bud growth inEuphorbia esulaL.

Weed Science ◽

10.1017/s0043174500092249 ◽

1999 ◽

Vol 47 (5) ◽

pp. 544-550 ◽

Cited By ~ 26

Author(s):

David P. Horvath

Keyword(s):

Lateral Roots ◽

Axillary Buds ◽

Minor Effect ◽

Correlative Inhibition ◽

Auxin Transport Inhibitor ◽

Naphthylphthalamic Acid ◽

Bud Growth ◽

A Minor ◽

Root Buds

Earlier studies on the source of signals controlling correlative inhibition of root buds (underground adventitious buds located on the lateral roots) inEuphorbia esulaindicated that either growing meristems (apical or axillary buds) or fully expanded leaves could prevent root buds from breaking quiescence. An investigation of the production and transport requirements of the leaf-derived signal is described. As few as three leaves remaining on budless stems greatly reduced the growth of (but not the number of growing) root buds. Also, light and CO2fixation were necessary for the leaf effects on root bud growth, but not necessary for correlative inhibition imposed by growing axillary buds. Treatment of plants with Ametryn induced root bud growth on budless plants but not on plants with intact axillary buds. The polar auxin transport inhibitor N-1-naphthylphthalamic acid prevented transmission or the signal from growing axillary buds, but it had only a minor effect on the transmission of the leaf-derived signal. Treatment of plants with gibberellic acid (GA) induced growth of root buds under otherwise noninducing conditions to some extent in all plants. However, the greatest effects of GA were on plants with intact leaves (meristemless/budless and meristemless). GA had no significant effect on root bud quiescence under conditions that induced root bud growth.

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Auxin and ETTIN in Arabidopsis gynoecium morphogenesis

Development ◽

10.1242/dev.127.18.3877 ◽

2000 ◽

Vol 127 (18) ◽

pp. 3877-3888 ◽

Cited By ~ 4

Author(s):

J.L. Nemhauser ◽

L.J. Feldman ◽

P.C. Zambryski

Keyword(s):

Auxin Transport ◽

Floral Organ ◽

Polar Auxin Transport ◽

Auxin Response ◽

Auxin Transport Inhibitor ◽

Increased Sensitivity ◽

Auxin Flux ◽

Naphthylphthalamic Acid

The phytohormone auxin has wide-ranging effects on growth and development. Genetic and physiological approaches implicate auxin flux in determination of floral organ number and patterning. This study uses a novel technique of transiently applying a polar auxin transport inhibitor, N-1-naphthylphthalamic acid (NPA), to developing Arabidopsis flowers to further characterize the role of auxin in organogenesis. NPA has marked effects on floral organ number as well as on regional specification in wild-type gynoecia, as defined by morphological and histological landmarks for regional boundaries, as well as tissue-specific reporter lines. NPA's effects on gynoecium patterning mimic the phenotype of mutations in ETTIN, a member of the auxin response factor family of transcription factors. In addition, application of different concentrations of NPA reveal an increased sensitivity of weak ettin alleles to disruptions in polar auxin transport. In contrast, the defects found in spatula gynoecia are partially rescued by treatment with NPA. A model is proposed suggesting an apical-basal gradient of auxin during gynoecium development. This model provides a mechanism linking ETTIN's putative transcriptional regulation of auxin-responsive genes to the establishment or elaboration of tissue patterning during gynoecial development.

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Faculty Opinions recommendation of A central role of Arabidopsis thaliana ovate family proteins in networking and subcellular localization of 3-aa loop extension homeodomain proteins.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1024968.292955 ◽

2005 ◽

Author(s):

Mark Running

Keyword(s):

Arabidopsis Thaliana ◽

Subcellular Localization ◽

Homeodomain Proteins

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Faculty Opinions recommendation of The role of AtMSH2 in homologous recombination in Arabidopsis thaliana.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1048267.500180 ◽

2006 ◽

Author(s):

Hans de Jong

Keyword(s):

Arabidopsis Thaliana ◽

Homologous Recombination

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Faculty Opinions recommendation of New Arabidopsis thaliana cytochrome c partners: a look into the elusive role of cytochrome c in programmed cell death in plants.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.718104360.793488383 ◽

2013 ◽

Author(s):

Daniel Gallie

Keyword(s):

Arabidopsis Thaliana ◽

Cell Death ◽

Cytochrome C ◽

Programmed Cell Death

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Role of melatonin in UV‐B signaling pathway and UV‐B stress resistance in Arabidopsis thaliana

Plant Cell & Environment ◽

10.1111/pce.13879 ◽

2020 ◽

Vol 44 (1) ◽

pp. 114-129

Author(s):

Jing‐Wen Yao ◽

Zheng Ma ◽

Yan‐Qin Ma ◽

Ying Zhu ◽

Meng‐Qi Lei ◽

...

Keyword(s):

Arabidopsis Thaliana ◽

Signaling Pathway ◽

Stress Resistance

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Seed Gamma Irradiation of Arabidopsis thaliana ABA-Mutant Lines Alters Germination and Does Not Inhibit the Photosynthetic Efficiency of Juvenile Plants

Dose-Response ◽

10.1177/1559325820979249 ◽

2020 ◽

Vol 18 (4) ◽

pp. 155932582097924

Author(s):

Darya Babina ◽

Marina Podobed ◽

Ekaterina Bondarenko ◽

Elizaveta Kazakova ◽

Sofia Bitarishvili ◽

...

Keyword(s):

Arabidopsis Thaliana ◽

Growth Response ◽

Dose Range ◽

Fine Tuning ◽

Plant Tolerance ◽

Inhibitory Effects ◽

Γ Irradiation ◽

Photosynthetic Responses ◽

Mutant Lines

Plant growth response to γ-irradiation includes stimulating or inhibitory effects depending on plant species, dose applied, stage of ontogeny and other factors. Previous studies showed that responses to irradiation could depend on ABA accumulation and signaling. To elucidate the role of ABA in growth and photosynthetic responses to irradiation, lines Col-8, abi3-8 and aba3 -1 of Arabidopsis thaliana were used. Seeds were γ-irradiated using 60Co in the dose range 50-150 Gy. It was revealed that the dose of 150 Gy affected germination parameters of aba3 -1 and Col-8 lines, while abi3-8 line was the most resistant to the studied doses and even showed faster germination at early hours after γ-irradiation at 50 Gy. These results suggest that susceptibility to ABA is probably more important for growth response to γ-irradiation than ABA synthesis. The photosynthetic functioning of 16-day-old plants mainly was not disturbed by γ-irradiation of seeds, and no indication of photosystem II photoinhibition was noticed, revealing the robustness of the photosynthetic system of A. thaliana. Glutathione peroxidase activity and ABA concentrations in plant tissues were not affected in the studied dose range. These results contribute to the understanding of germination and photosynthesis fine-tuning and of mechanisms of plant tolerance to ionizing radiation.

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