Electric and structural studies of hormone interaction with chloroplast envelope membranes isolated from vegetative and generative rape

Filek, Maria; Zembala, Maria; Dudek, Anna E.; Laggner, Peter; Kriechbaum, Manfred

doi:10.1016/j.jplph.2006.05.015

Cited by 6 publications

(2 citation statements)

References 31 publications

(32 reference statements)

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“…The measurements of zeta potential, size distribution and SAXS scattering were performed within a time not longer than 0.5-1 h after preparation. As found in earlier experiments (Filek et al, 2007), during this time interval chloroplasts stayed intact, in the sense of keeping unchanged shape (checked under optical microscope) and constant conductivity of the suspension.…”

Section: Isolation Of Chloroplasts and Chloroplast Envelopessupporting

confidence: 83%

Effect of selenium on characteristics of rape chloroplasts modified by cadmium

Filek

Gzyl-Malcher

Zembala

et al. 2010

Journal of Plant Physiology

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Section: Isolation Of Chloroplasts and Chloroplast Envelopessupporting

confidence: 83%

Effect of selenium on characteristics of rape chloroplasts modified by cadmium

Filek

Gzyl-Malcher

Zembala

et al. 2010

Journal of Plant Physiology

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“…Yet it is, unfortunately, unknown whether this is the form of ZEN occurring in the studied species. The energy flow through photosystems involves chloroplast membranes and it is impossible to exclude the possibility that the cause of the observed ZEN effects could result from its interactions with those structures (Vianello and Macri 1978;Filek et al 2002Filek et al , 2007. The increase in photochemical activity of PSII in soybean seedlings after soaking of seeds in ZEN solutions (Table 3) proved similar to that in leaf discs incubated in ZEN solutions.…”

Section: Photochemical Activity Of Psiimentioning

confidence: 92%

The effect of zearalenone on PSII photochemical activity and growth in wheat and soybean under salt (NaCl) stress

et al. 2011

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The effects of mycotoxin zearalenone (ZEN) on the photochemical activity of photosystem II (PSII) in wheat and soybean leaf discs incubated in ZEN solutions as well as the after-effects of pre-sowing soaking of seeds in solutions containing ZEN on the photochemical activity of PSII and on the seedlings growth under salt stress (NaCl solutions were investigated). The incubation of wheat leaf discs in ZEN solutions strongly inhibited the energy flux per cross section (CS) for absorption (ABS/CS), trapping (TRo/CS) and electron transport (ETo/CS), while the effects of ZEN action on soybean discs were opposite and the values of those parameters significantly increased with the increase in ZEN concentration. Incubation of seeds in a ZEN solution resulted in an increase in photochemical efficiency of PSII in soybean seedlings, but did not induce any response of PSII in those of wheat at medium illuminations. Only at the stronger illumination for both species did ZEN induce an increase in efficiency of excitation energy capture by open PSII reaction centers, photochemical quenching of chlorophyll a fluorescence and quantum yield of PSII electron transport. Pre-sowing soaking of seeds in a ZEN solution decreased the photoinhibitory injuries of PSII in wheat and soybean due to safe scattering of the excess excitation energy through an increase in energy-dependent quenching (qE) and state transition quenching (qT). ZEN when added to NaCl solutions during the period of germination contributed to reduction in the growth inhibition of wheat seedlings. The incubation of wheat leaf discs in ZEN solutions strongly inhibited CS, ABS/CS, TRo/CS and ETo/CS. Possible effects of ZEN on some physiological processes in plants have been discussed especially in the context with photochemical activity of PSII and a salt stress.

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Can the Giberella zeae toxin zearalenone affect the photosynthetic productivity and increase yield formation in spring wheat and soybean plants?

Kościelniak¹,

Biesaga‐Kościelniak²,

Janeczko³

et al. 2009

Photosynt.

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The seeds of soybean cv. Aldana and spring wheat cv. Torka were soaked for 24 h in solution of zearalenone [ZEN, 2,4-dihydroxy-6-(10-hydroxy-6-oxo-trans-1-undecenyl)-benzonic acid lactone, 4 mg dm -3 ] and then they were sown in the pot experiment in an open vegetation hall. The after-effects of ZEN on growth of plants, net photosynthetic (P N ) and transpiration (E) rates, stomatal conductance (g s ), photochemical efficiency of photosystem II (PSII) and on final seeds yield, were determined. A significant increase of seeds yield was revealed in plants of both cultivars i.e. by 22% and 19% of seed (grain) number and by 28 and 24% of seed (grain) mass, in soybean and in wheat, respectively. The photosynthetic rate (P N ) was stimulated during the juvenile and final phase by about 13.6% (average) in soybean plants. During other developmental stages, assimilation of CO 2 was retarded. The response of CO 2 assimilation in wheat plants was less pronounced as compared to that in soybean, but an increase of P N by over 24% near the final stage of development was observed. The quantum yield of PSII electron transport (Φ PSII ) in soybean plants was changed after the treatment of seeds by ZEN similarly as for the rate of CO 2 , whereas in wheat it continued to gradually increase i.e. during the whole growth period. Changes of Φ PSII both in soybean and in wheat plants, as the response to ZEN treatment, were accompanied with an increase in the efficiency of changes occurring within the antenna (F v '/F m ') as well as within centres of photochemical reactions (q p ). The conclusion is that ZEN can affect plant growth and development in many ways, as well as in the status and functioning of the photosynthetical apparatus. Some of the effects can be very longlasting, as e.g. stimulation of production of seed yield in response to treatment of seeds with this substance.

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Electric and structural studies of hormone interaction with chloroplast envelope membranes isolated from vegetative and generative rape

Cited by 6 publications

References 31 publications

Effect of selenium on characteristics of rape chloroplasts modified by cadmium

Effect of selenium on characteristics of rape chloroplasts modified by cadmium

The effect of zearalenone on PSII photochemical activity and growth in wheat and soybean under salt (NaCl) stress

Can the Giberella zeae toxin zearalenone affect the photosynthetic productivity and increase yield formation in spring wheat and soybean plants?

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