Water stress-induced flag leaf senescence may be accelerated by rehydration

Hura, Tomasz; Hura, Katarzyna; Ostrowska, Agnieszka; Gadzinowska, Joanna; Fiust, Anna

doi:10.1016/j.jplph.2019.01.013

Cited by 8 publications

(6 citation statements)

References 54 publications

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“…Lyophilized flag leaves (Freeze Dry System/Freezone® 4.5, LABCONCO Kansas City, MO, USA) were ground to a fine powder in a mixer mill homogenizer (MM400, Retsch, Haan, Germany). The powdered plant material was then subjected to certain analyses (chlorophyll, carotenoid, soluble phenolic and soluble carbohydrate contents) according to (Hura et al, 2019). Each of these metabolites was analysed spectrophotometrically using a microplate reader (Synergy II; BioTek, Winooski, VT, USA).…”

Section: Methodsmentioning

confidence: 99%

“…A visible manifestation of drought is accelerated plant senescence associated with the yellowing of leaves due to chlorophyll degradation (Schlemmer et al, 2005). This leads to a significant reduction in plant assimilation surface and photosynthetic capacity, which, as a consequence, leads to a reduction in yields (Hura et al, 2019;Ostrowska et al, 2019a;Riasat et al, 2019). Moreover, leaf chlorophyll content is a fundamental variable for the understanding of plant responses to the environment as it is a potential indicator of the degree of stress, this is due to the fact that it has a direct role in the photosynthetic process of light capture and electron transport (Schlemmer et al, 2005).…”

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confidence: 99%

“…As carbohydrates are consumed in the synthesis of phenolic compounds, the increase in cellular levels of phenols is frequently accompanied by a reduction in carbohydrate levels (Arnold et al, 2004). For these reasons, chlorophyll degradation, a reduction in carbohydrate levels, and an increase in phenolic compound levels may be considered as biochemical indicators of senescence in plant organs (Ostrowska et al, 2019b;Hura et al, 2019). Rivero et al (2007) are of the opinion that plant tolerance to drought can be increased by delaying senescence.…”

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confidence: 99%

“…Rehydration after soil drought is a period of plant regeneration during which the optimum level of plant metabolism should be restored, this includes the inhibition or reduction of the plant senescence process. However, it has been demonstrated that during rehydration, flag leaf senescence may continue, or even accelerate (Baczek-Kwinta et al, 2006;Hura et al, 2015;Hura et al, 2019). This is an effect of the intensified metabolic processes which occur in hydrated cells, and cause, amongst other effects, PSII electron transport chain dysfunction and the transfer of electrons from primary acceptors Q A /Q B onto oxygen molecules.…”

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confidence: 99%

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A delay in the senescence during a rehydration following soil drought is a precondition for limiting yield loss in triticale

Ostrowska¹,

Dziurka²,

Hura³

et al. 2023

Int. Agrophys.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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A delay in the senescence during a rehydration following soil drought is a precondition for limiting yield loss in triticale

Ostrowska¹,

Dziurka²,

Hura³

et al. 2023

Int. Agrophys.

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“…Finally, agricultural lands can be subject to the inundation of water over-spilling from ditches, rivers, and streams during periods of intense rainfall [5,6]. Our previous research shows that plant aging induced by soil drought can be continued and even intensified by too rapid irrigation in the rehydration phase [7]. Water availability is critical for wheat production, and drought is the major cause of yield losses [8,9].…”

Section: Introductionmentioning

confidence: 99%

Physiological Comparison of Wheat and Maize Seedlings Responses to Water Stresses

Ostrowska

Hura

2022

Sustainability

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The aim of the study was to investigate specific responses of spring wheat (C3 photosynthesis) and maize (C4 photosynthesis) to drought and flooding stress. Analyses of water content, gas exchange intensity, photosynthetic apparatus activity, chlorophyll content, plant height and biological membrane integrity were performed on the 10th day of drought and flooding in both species at the third leaf stage. A specific response of wheat under both drought and flooding conditions involved an increase in ETo/RC ratio, describing electron transport flux converted into a single reaction center in PSII. Correlations between electrolyte leakage and the probability of electron transport beyond the plastoquinone QA, and the amount of energy used for the electron transport were also found. A specific response of maize during flooding was the increase of stomatal conductance. Additionally, a significant correlation between PN/Ci and relative water content was exhibited. Furthermore, the parameters differentiating the studied species only under stressful conditions were rendered. The application of such parameters can be widely used, e.g., for studying the reaction of a potential cultivars to drought and flooding. Providing such information to potential farmers can help better select cultivars for their environmental conditions.

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Accumulation of Hydrogen Peroxide in Flag Leaves Induces Effective Regeneration of Triticale During Rehydration After Water Stress

Ostrowska,

Hura,

Hura

2024

J Plant Growth Regul

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A key element in the effective recovery of plants after drought is slowing down of their senescence accelerated during the drought. Therefore, in this paper the relationships between hydrogen peroxide content and effective recovery during rehydration after water stress were analyzed. The study focused on two DH lines of winter triticale with different regeneration potential, as shown by different numbers of lateral stems with ears, grown during rehydration after water stress. During rehydration, the GZDH27 line grows two to three lateral stems with ears, whereas the GZDH88 line grows a single lateral stem with ear. The two DH lines of winter triticale showed comparable responses to the drought stress but their responses to rehydration after the drought stress were clearly different. Results revealed, that the increased accumulation of hydrogen peroxide, which was induced during the drought, can be maintained during rehydration, thus stimulating plant senescence. In the line GZDH88, rehydration did not slow down drought-induced senescence. This was manifested by higher levels of hydrogen peroxide, accompanied by lower levels of chlorophyll in the flag leaves of GZDH88 plants, as the result of which only one lateral stem was formed during rehydration. However, development of one lateral stems during rehydration in the GZDH88 line allowed for smaller yield loss than in the GZDH77 line, that developed of three lateral stems during rehydration. The efficient production of carbohydrates and their effective allocation into the ears of the lateral stems required considerable energy expenditure in the GZDH27 line. Our results indicate that growing three lateral stems with ears during rehydration does not guarantee limitation of grain yield loss. However, to reach the final conclusion, it is important to evaluate a greater number of triticale genotypes under drought stress and rehydration during various stages of a plants development.

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Water stress-induced flag leaf senescence may be accelerated by rehydration

Cited by 8 publications

References 54 publications

A delay in the senescence during a rehydration following soil drought is a precondition for limiting yield loss in triticale

A delay in the senescence during a rehydration following soil drought is a precondition for limiting yield loss in triticale

Physiological Comparison of Wheat and Maize Seedlings Responses to Water Stresses

Accumulation of Hydrogen Peroxide in Flag Leaves Induces Effective Regeneration of Triticale During Rehydration After Water Stress

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