Exogenous Methyl Jasmonate Alters Trichome Density on Leaf Surfaces of Rhodes Grass (Chloris gayana Kunth)

Kobayashi, Hidekazu; Yanaka, Mikiko; Ikeda, Tatsuya

doi:10.1007/s00344-010-9161-0

Cited by 20 publications

(30 citation statements)

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“…It is known that the leaf area and the number of cells are negatively correlated with the cell density (Kobayashi et al 2010); hence, the greatest leaf area after the 24-h exposure to MJ may have been caused by the elevated number of cells. However, our results concerning the MJ influence on leaf area were opposed to these reported by Kobayashi et al (2010) mainly because of the prominent differences in the MJ concentration. Furthermore, MJ synthesis takes place mainly in leaves; therefore, only leaves, but not the whole shoots, could be particularly sensitive to exogenous MJ.…”

Section: Discussionmentioning

confidence: 99%

“…At a concentration of 100 lM or higher MJ repressed germination Electronic supplementary material The online version of this article (doi:10.1007/s10725-015-0048-8) contains supplementary material, which is available to authorized users. and plant growth (Jubany-Marí et al 2010;Kobayashi et al 2010) and genes involved in photosynthesis, such as ribulose bisphosphate carboxylase/oxygenase (Rubisco), chlorophyll a/b-binding protein, light harvesting complex II, and early light-induced proteins, were down-regulated (Jung et al 2007). At a concentration of 50 lM or lower, MJ mostly, but not always (Noir et al 2013), stimulated plant growth, lateral root initiation and growth, dry matter accumulation, biomass production, photosynthetic pigment levels, and elevation of the net photosynthetic rate (Tung et al 1996;Mabood et al 2006;Piotrowska et al 2010;Wu et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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The effect of methyl jasmonate on selected physiological parameters of copper-treated Phaseolus coccineus plants

2015

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Phaseolus coccineus plants in the early growth stage were preincubated with 10 -5 M methyl jasmonate (MJ) for 1 or 24 h and subsequently transferred to a Hoagland solution or treated with 50 or 100 lM copper (Cu). After 6-day exposure to the metal, plant growth, relative water content, electrolyte leakage, the content of Cu and photosynthetic pigments, and chlorophyll fluorescence parameters were assayed. Generally, under Cu excess, MJ did not modulate growth parameters such as leaf area, root growth, shoot and root fresh weight, and the shoot/root fresh weight ratio. The content of chlorophyll a, b, and carotenoids increased with the increasing Cu content in the leaves. However, a correlation between the reduction of the leaf area and the lower content of the three photosynthetic pigments for 24-h MJ ? 100-lM Cu treatment compared with metal alone was noted. The decrease in the Cu concentration was MJ-dependent only after 1-h MJ ? 50-lM Cu treatment in leaves and after 24-h MJ ? 100-lM Cu treatment in roots. Chlorophyll fluorescence was a weak indicator of the effect induced by MJ in Cu excess, and the most spectacular increase was observed for 1-h and 24-h MJ ? 50 lM Cu in the LNU and for 1-h MJ ? 50 lM Cu in the NPQ parameter. These results suggested a lack of a clear pattern for MJ altering the Cu stress in the runner bean plants. The most important finding was that photosynthesis seemed to be quite resistant to Cu stress and slight modifications in chlorophyll fluorescence were accompanied by significant changes in growth parameters, photosynthetic pigment content, and metal content in the plant. The results obtained may have been strongly related to the plant growth stage, as the measured parameters transform greatly during plant growth and development.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of methyl jasmonate on selected physiological parameters of copper-treated Phaseolus coccineus plants

2015

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“…Scanning electron microscopy was conducted without any pretreatment at an accelerating voltage of 8.00 kV under low vacuum conditions of 70 Pa at -25˚C according to previous reports (Araki et al, 2009;Kobayashi et al, 2010b).…”

Section: Genotyping and Construction Of A Linkage Mapmentioning

confidence: 99%

Evidence from principal component analysis for improvement of grain shape- and spikelet morphology-related traits after hexaploid wheat speciation

et al. 2012

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Grain shape and size are involved in the main components of the domestication syndrome in cereals. Wheat grain shape has been dramatically altered at each stage of the domestication of tetraploid wheat and through common wheat speciation. To elucidate the evolutionary change of wheat grain shape, principal component (PC) analysis of grain shape-related traits was first conducted using wild and cultivated tetraploid, synthetic hexaploid, and common wheat accessions. The synthetic hexaploid wheat lines were previously produced through interspecific crosses between two common wheat progenitors, tetraploid wheat and Aegilops tauschii, and produced grains similar to those of cultivated tetraploid wheat. To identify genetic loci related to the difference in grain shape between common wheat and the synthetic wheat, the 15 traits related to grain and spikelet shape were measured in 108 F 2 individuals between Norin 61 and a synthetic wheat line, and the first three PC values for the 15 traits, PC1, PC2 and PC3, were mapped as quantitative traits in the F 2 population. In total, six QTLs, found on chromosomes 1A, 5A, 1D, 2D and 7D, showed significant LOD scores. Among them, a QTL for PC2, located on the 2DS chromosomal region near the Ppd-D1 locus, mainly contributed to the phenotypic difference in grain shape. Tg-D1, controlling tenacious glume phenotype, was located at a similar region to the 2DS QTL, which suggested that the Tg-D1 locus pleiotropically affects not only glume toughness but also spikelet and grain shape in hexaploid wheat. Therefore, it was predicted that wheat grains were rapidly improved toward a shorter and rounder phenotype accompanied with free-threshing wheat formation.

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“…In Arabidopsis, jasmonic acid (JA), a jasmonate, increases the size and density of trichomes, and 6-benzylaminopurine, a cytokinin, reduces trichome size but increases their density (Maes et al 2008). Since application of these two hormones increases trichome density in Poaceae plants (Kobayashi et al 2010;Ramadan and Flowers 2004), their application was also expected to affect trichome size for plants in the Poaceae, including wheat.…”

Section: Introductionmentioning

confidence: 97%

6-Benzylaminopurine treatment induces increased pubescence on wheat leaves

2012

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The epidermis of wheat (Triticum aestivum L.) leaves contains trichomes that contribute to resistance to insect pests and drought tolerance. In the present study, we examined the effects of 6-benzylaminopurine (BA) and methyl jasmonate (MeJA) treatment on trichome development on the leaves of wheat cv. Norin 61 seedlings. Without phytohormone treatment, trichomes on the adaxial leaf surface were short (90 lm) and their density was low (3.6 trichomes/mm 2 ). Both BA and MeJA treatments significantly increased the density of trichomes, and there were no significant differences between the phytohormone treatments. BA treatment increased trichome length to five times as long as that in the control, whereas MeJA treatment did not significantly affect trichome length. Since BA treatment concurrently increased the DNA content of the nuclei in trichome cells, endoreduplication of the nuclei is probably involved in trichome enlargement. These results indicate that even wheat cultivars with short trichomes retain the mechanisms for trichome enlargement and stimuli such as BA application can induce increased pubescence on wheat leaves.

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Exogenous Methyl Jasmonate Alters Trichome Density on Leaf Surfaces of Rhodes Grass (Chloris gayana Kunth)

Cited by 20 publications

References 20 publications

The effect of methyl jasmonate on selected physiological parameters of copper-treated Phaseolus coccineus plants

The effect of methyl jasmonate on selected physiological parameters of copper-treated Phaseolus coccineus plants

Evidence from principal component analysis for improvement of grain shape- and spikelet morphology-related traits after hexaploid wheat speciation

6-Benzylaminopurine treatment induces increased pubescence on wheat leaves

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