Methyl jasmonate is a more effective senescence-promoting factor in Cucurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence

Ananieva, Kalina; Ananiev, E. D.; Mishev, Kiril; Georgieva, Katya; Malbeck, Jiří; Kamínek, M.; Staden, J. Van

doi:10.1016/j.jplph.2006.07.008

Cited by 25 publications

(22 citation statements)

References 48 publications

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“…MJ did not exert any effect on Cu exposed plants in the F v /F m ratio. The unchanged F v /F m ratio in our experiments with MJ1Cu50, MJ24Cu50 and MJ supplementation is in agreement with the results obtained in the initial growth stage in other research papers (Krupa et al 1993;Maksymiec and Baszyński 1996a;Ananieva et al 2007;Fedina et al 2009) and suggests that the maximal photochemical yield of PSII was insensitive to MJ ? 50 lM Cu and to MJ alone.…”

Section: Discussionsupporting

confidence: 93%

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: Discussionsupporting

confidence: 93%

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

2015

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“…The effect of darkness on cotyledon senescence was studied after transfer of intact 7-day-old Cucurbita pepo (zucchini) seedlings to darkness for 24 h (Ananieva et al 2007). The results showed no effect on both the maximal PSII quantum yield estimated by the F V /F M ratio and the rate of CO 2 uptake.…”

Section: Introductionmentioning

confidence: 99%

Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

et al. 2008

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Darkness mediates different senescencerelated responses depending on the targeting of dark treatment (whole plants or individual leaves) and the organs that perceive the signal (leaves or cotyledons). In this study, we presented data on the differential effects of 2-day dark treatment on progression of senescence in cotyledons and primary leaves of 14-day-old plants of Cucurbita pepo L. (zucchini). The lack of changes in chlorophyll a, chlorophyll b and carotenoid contents as well as in the PSI activity measured by the far-red induced alterations in the P 700 oxidation levels and the quantum yield of electron transport from Q A -to PSI end acceptors (u R 0 ) indicated higher resistance of cotyledons to the applied dark stress compared to the primary leaves. In contrast to cotyledons, PSI activity in the primary leaves was significantly inhibited. Concerning the activity of PSII analyzed by the changes in the JIPtest parameters (the maximal efficiency of PSII photochemistry, u P 0 ; the performance index, PI ABS ; the efficiency of Q A -reoxidation, w 0 and the effective dissipation per reaction center, DI 0 /RC), no differences were observed between cotyledons and primary leaves, thus suggesting that PSI activity in the true leaves was more susceptible to the applied dark stress. The transfer of the darkened plants to normal light regime resulted in delayed senescence in cotyledons which was in contrast to results on Arabidopsis, thus implying the existence of specific mechanisms of cotyledon senescence in different monocarpic plants.Keywords Dark-induced senescence and recovery Á Cotyledons and primary leaves Á PSII and PSI activity Á JIP-test Abbreviations PSA Photosynthetic apparatus PSI Photosystem I PSII Photosystem II RC PSII reaction center Chl

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“…They can also induce the disorganization of the thylakoid membrane system in chloroplasts, affect the functional activity of PSII, decrease the rates of transpiration and photosynthesis, as well as cell up-regulates several SAGs shown in different plants (Ananieva et al 2004b;Beltrano et al 1998;He and Gan 2001;He et al 2002;Liu et al 2015;Weaver et al 1998;Weidhase et al 1987a, b;Woo et al 2001;Oh et al 1996). Jasmonates have been widely shown to be powerful promoters of leaf senescence (Chen and Kao 1998;Chou and Kao 1992;Hung and Kao 1996;Tsai et al 1996;Ueda and Kato 1981;Weidhase et al 1987a), but their participation in cotyledon senescence is still poorly understood (Ananieva et al 2004a(Ananieva et al , 2007. In the present study, we evaluate the effects of darkness and JAs on the senescence of I. nil cotyledons.…”

Section: Discussionmentioning

confidence: 99%

“…Studies performed in many plant species show that JAMe, formed in the reaction catalyzed by JASMONIC ACID CARBOXYL METHYLTRANSFERASE (JMT), regulates the sprouting of seeds, participates in proper flower morphogenesis and flower induction, and is involved in responses to stress, which also includes promoting effect on leaf senescence (Ananieva et al 2007;Kęsy et al 2011;Maciejewska and Kopcewicz 2002;Maciejewska et al 2004;Norastehnia et al 2007;Wang 1998;Wilson et al 2011).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Methyl jasmonate-dependent senescence of cotyledons in Ipomoea nil

et al. 2016

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Jasmonic acid methyl ester (JAMe) has been recently shown to play a crucial role in many physiological processes. In this paper, we focused on cotyledon senescence in Ipomoea nil and revealed that JAMe and darkness are the main factors stimulating the process examined. What is more, we showed that mefenamic acid (a jasmonate biosynthesis inhibitor) reverses the stimulatory effect of darkness on senescence. In plants growing under dark conditions, stimulation of JASMONIC ACID CAR-BOXYL METHYLTRANSFERASE (InJMT) expression and, consequently, an increase in JAMe content, have been observed. In turn, the level of jasmonic acid (JA) gradually decreased. Moreover, dark-grown seedlings demonstrated a lower PSII functional activity and a reduced chlorophyll content and autofluorescence. All of these data suggest that JAMe is a signal molecule controlling the senescence of cotyledons in I. nil.

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Methyl jasmonate is a more effective senescence-promoting factor in Cucurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence

Cited by 25 publications

References 48 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

Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

Methyl jasmonate-dependent senescence of cotyledons in Ipomoea nil

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