Endogenous Control of Photosynthetic Activity during Progressive Drought: Influence of Final Products of Photosynthesis

Drozdova, I. S.; Pustovoitova, T. N.; Dzhibladze, T. G.; Barabanshchikova, N. S.; Zhdanova, N. E.; Maevskaya, S. N.; Bukhov, N. G.

doi:10.1023/b:rupp.0000040755.53233.a5

Cited by 15 publications

(9 citation statements)

References 26 publications

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“…4). A similar result was also reported by Drozdova et al (2004) in dehydrated cucumber plants. One possible explanation could be that the limitation of electron flow to PSI caused an increase in P700 oxidation (decreased PSII electron transport activity quantified by the decrease in UPSII, Fig.…”

Section: Desiccation At High Temperaturesupporting

confidence: 89%

Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

et al. 2011

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Haberlea rhodopensis plants, growing under low irradiance in their natural habitat, were desiccated to air-dry state at a similar light intensity (about 30 μmol m(-2) s(-1)) under optimal (23/20°C, day/night) or high (38/30°C) temperature. Dehydration of plants at high temperature increased the rate of water loss threefold and had a more detrimental effect than either drought or high temperature alone. Water deficit decreased the photochemical activity of PSII and PSI and the rate of photosynthetic oxygen evolution, and these effects were stronger when desiccation was carried out at 38°C. Some reduction in the amount of the main PSI and PSII proteins was observed especially in severely desiccated Haberlea leaves. The results clearly showed that desiccation of the homoiochlorophyllous poikilohydric plant Haberlea rhodopensis at high temperature had more damaging effects than desiccation at optimal temperature and in addition recovery was slower. Increased thermal energy dissipation together with higher proline and carotenoid content in the course of desiccation at 38°C compared to desiccation at 23°C probably helped in overcoming the stress.

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Section: Desiccation At High Temperaturesupporting

confidence: 89%

Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

et al. 2011

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“…But the source for this accumulation has controversy up to date. Though an explanation of this observation is that sucrose export is retarded from the leaf to sink organs [38] , we suppose that the increased sucrose and starch contents in the stems may be attributed to the decrease of them in the leaves of R. soongorica during the late stages of drought treatment when the plant approached dormancy. But whether the starch is used as a source for sucrose accumulation during the dormant state was unknowable.…”

Section: Discussionmentioning

confidence: 98%

Protective mechanism of desiccation tolerance in Reaumuria soongorica: Leaf abscission and sucrose accumulation in the stem

Liu

Zhang

et al. 2007

SCI CHINA SER C

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Reaumuria soongorica (Pall.) Maxim., a perennial semi-shrub, is widely found in semi-arid areas in northwestern China and can survive severe desiccation of its vegetative organs. In order to study the protective mechanism of desiccation tolerance in R. soongorica, diurnal patterns of net photosynthetic rate (Pn), water use efficiency (WUE) and chlorophyll fluorescence parameters of Photosystem II (PSII), and sugar content in the source leaf and stem were investigated in 6-year-old plants during progressive soil drought imposed by the cessation of watering. The results showed that R. soongorica was characterized by very low leaf water potential, high WUE, photosynthesis and high accumulation of sucrose in the stem and leaf abscission under desiccation. The maximum Pn increased at first and then declined during drought, but intrinsic WUE increased remarkably in the morning with increasing drought stress. The maximal photochemical efficiency of PSII (Fv/Fm) and the quantum efficiency of noncyclic electric transport of PSII (phiPSII) decreased significantly under water stress and exhibited an obvious phenomenon of photoinhibition at noon. Drought stressed plants maintained a higher capacity of dissipation of the excitation energy (measured as NPQ) with the increasing intensity of stress. Conditions of progressive drought promoted sucrose and starch accumulation in the stems but not in the leaves. However, when leaf water potential was less than -21.3 MPa, the plant leaves died and then abscised. But the stem photosynthesis remained and, afterward the plants entered the dormant state. Upon rewatering, the shoots reactivated and the plants developed new leaves. Therefore, R. soongorica has the ability to reduce water loss through leaf abscission and maintain the vigor of the stem cells to survive desiccation.

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“…Wang & Zhang (2004), Li et al (2010) and Hao et al (2012) reported increased soluble protein in the leaves of cucumber seedlings after 7 days of drought stress treatment or after 18 days 7,16,27 . Similarly to the increase in soluble sugar, the increase in soluble protein is thought to be a positive response to drought stress 4,7,16,24,26,27 .…”

Section: Metabolic Property Of Nitrogenmentioning

confidence: 99%

“…Water is the key requirement for plant cells. Drought stress results in the generation and accumulation of active oxygen species, the peroxidation of membrane lipids, and impairment of nitrogen metabolism, photosynthesis, growth and development, causing a substantial decline in yield and quality 4,7,13,14,[16][17][18]23,26,30 . To what extent does the level of active oxygen species increase in the leaves of cucumber under drought stress; how much is nitrogen metabolism, which plays a prominent role in production, inhibited; and how is photosynthesis, which strongly depends on water metabolism, affected?…”

Section: Introductionmentioning

confidence: 99%

“…The threat of drought stress on plants is increasing with global warming and reduced water resources, meaning it is necessary to closely investigate the physiological damage of drought stress on crops with high water requirements such as the cucumber. Cucumber seedlings are more sensitive to water change compared to adult plants and thus heavily studied in drought stress research 4,7,13,14,[16][17][18]23,26,30 . Water is the key requirement for plant cells.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Drought Stress on the Metabolic Properties of Active Oxygen Species, Nitrogen and Photosynthesis in Cucumber ‘Jinchun No. 5’ Seedlings

Nishimura

Zhao

et al. 2014

JARQ

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To gain a physiological understanding of the effect of drought stress on the cucumber (Cucumis sativus L.), we subjected 'Jinchun No. 5' seedlings to three treatments: control (C), moderate drought stress (MDS) and severe drought stress (SDS) during exposure to high temperature and strong light. We then investigated the metabolic properties of active oxygen species, nitrogen and photosynthesis in leaves from the 3rd to 15th days of treatment. The amounts of active oxygen species superoxide anion (O 2˙‾ ) and hydrogen peroxide (H 2 O 2 ) increased with increasing drought stress in C, MDS and SDS. The malondialdehyde (MDA) content, which reflects the excess metabolism of active oxygen was increased on the 12th and 15th days of treatment with increasing drought stress. The nitrate-reductase (NR) activity of nitrogen metabolism indicators decreased on the 3rd to 15th days of treatment, while soluble protein content increased on the 9th to 15th days of treatment with increasing drought stress. With respect to the photosynthetic properties, stomatal conductance (g s ) decreased from the 6th to 15th days of treatment with increasing drought stress, no significant difference was seen in sub-stomatal CO 2 concentration (C i ) between all three treatment plots, transpiration rate (E) was lower in SDS than C, and the net photosynthesis rate (A) decreased with increasing drought stress. A significant correlation between g s , H 2 O 2 and E with A, and secondly between MDA and NR with A was observed. These findings suggest that drought stress during periods of high temperature and strong light results in the generation and accumulation of abundant active oxygen species, and inhibition of nitrogen and photosynthesis metabolism in cucumber 'Jinchun No. 5' seedlings.

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Endogenous Control of Photosynthetic Activity during Progressive Drought: Influence of Final Products of Photosynthesis

Cited by 15 publications

References 26 publications

Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

Protective mechanism of desiccation tolerance in Reaumuria soongorica: Leaf abscission and sucrose accumulation in the stem

Effects of Drought Stress on the Metabolic Properties of Active Oxygen Species, Nitrogen and Photosynthesis in Cucumber ‘Jinchun No. 5’ Seedlings

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