Effects of salinity on the photosynthetic apparatus of two Paulownia lines

Stefanov, Martin; Yotsova, Ekaterina; Rashkov, Georgi D.; Ivanova, K. P.; Markovska, Yuliana; Аpostolova, Emilia

doi:10.1016/j.plaphy.2016.01.017

Cited by 52 publications

(45 citation statements)

References 41 publications

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“…As was observed in our results, salinity stress tended to enhance the Chl t and C t content per leaf area (Figure 1), although the total pigment content per plant decreased as a result of smaller leaves. Previous studies have also shown that salinity stress increases Chl t per leaf area in salt-tolerant plants [99], and an increase in Chl t under salt stress could be used as a biochemical indicator of salt tolerance in plants [94,100]. Moderate salinity stress enhances the biosynthesis of Chl t and C t content in order to preserve proper functioning of the photosynthesis system.…”

Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 98%

“…Stress has varying effects on SLA. In typical cases [81,100,103], SLA has shown decreased values under drought/salinity stress as an adaptation to the prevailing stress. A logical explanation is that the lower surface area per leaf mass would result in less transpiration and conservation of water.…”

Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 99%

“…The response to salinity stress was somewhat different, with increased salinity tending to increase pigment content. A variable response of chlorophyll content to salt stress has been reported for a range of species, depending on their level of salt tolerance [56,100,102,103]. As a defense mechanism in response to salinity stress, leaf thickness and mass per unit area increase, and thus specific leaf area (SLA) can decrease.…”

Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 99%

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Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

2017

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Abiotic stress can alter key physiological constituents and functions in green plants. Improving the capacity to monitor this response in a non-destructive manner is of considerable interest, as it would offer a direct means of initiating timely corrective action. Given the vital role that plant pigments play in the photosynthetic process and general plant physiological condition, their accurate estimation would provide a means to monitor plant health and indirectly determine stress response. The aim of this work is to evaluate the response of leaf chlorophyll and carotenoid (C t ) content in wheat (Triticum aestivum L.) to changes in varying application levels of soil salinity and fertilizer applied over a complete growth cycle. The study also seeks to establish and analyze relationships between measurements from a SPAD-502 instrument and the leaf pigments, as extracted at the anthesis stage. A greenhouse pot experiment was conducted in triplicate by employing distinct treatments of both soil salinity and fertilizer dose at three levels. Results showed that higher doses of fertilizer increased the content of leaf pigments across all levels of soil salinity. Likewise, increasing the level of soil salinity significantly increased the chlorophyll and C t content per leaf area at all levels of applied fertilizer. However, as an adaptation process and defense mechanism under salinity stress, leaves were found to be thicker and narrower. Thus, on a per-plant basis, increasing salinity significantly reduced the chlorophyll (Chl t ) and C t produced under each fertilizer treatment. In addition, interaction effects of soil salinity and fertilizer application on the photosynthetic pigment content were found to be significant, as the higher amounts of fertilizer augmented the detrimental effects of salinity. A strong positive (R 2 = 0.93) and statistically significant (p < 0.001) relationship between SPAD-502 values and Chl t and between SPAD-502 values and C t content (R 2 = 0.85) was determined based on a large (n = 277) dataset. We demonstrate that the SPAD-502 readings and plant photosynthetic pigment content per-leaf area are profoundly affected by salinity and nutrient stress, but that the general form of their relationship remains largely unaffected by the stress. As such, a generalized regression model can be used for Chl t and C t estimation, even across a range of salinity and fertilizer gradients.

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Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 98%

Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 99%

Section: Effect Of Stress On Pigment Content Per Unit Leaf Areamentioning

confidence: 99%

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Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

2017

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“…Treatment over a longer period of time could be used in conjunction with the data obtained from the 10-day treatment to analyze salt-induced changes in gene expression over a longer period of time. Different levels of salinity up to 200 mM have been tested on Paulownia hybrid lines (Stefanov et al 2016) displaying the trees ability to survive high levels of salinity; transcriptome expression in response to different levels of salinity would be beneficial tool for understanding the mechanisms involved in salt tolerance. The function of genes in relation to salinity was hypothesized based on previous publications that have also referenced genes in response to salt stress in plants.…”

Section: Resultsmentioning

confidence: 99%

“…This abiotic stress substantially affects agriculture worldwide, including biomass crops used for biofuel production purposes. Knowledge of genes involved in salt stress regulation is limited, yet 20% of the world's cultivated plant productivity is impacted by salinity (Stefanov et al 2016). According to the United Nations, as of 2013, salt-induced crop loss was estimated at $441 per hectare or equivalent to $27.3 billion per year (World Losing Farm Soil … 2013).…”

Section: Introductionmentioning

confidence: 99%

RNA-seq analysis of the salt stress-induced transcripts in fast-growing bioenergy tree, Paulownia elongata

Chaires

Gupta

Joshee

et al. 2017

Journal of Plant Interactions

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Paulowina elongata is a fast-growing tree species is grown in different climates and types of soils. Environmental adaptability as well as high-yielding biomass make the P. elongata species an ideal candidate for biofuel production. High soil salinity is known to inhibit plant growth dramatically or leads to plant death. The purpose of this study was to characterize the salt-induced changes in the transcriptome of P. elongata. Transcriptome differences in response to salt stress were determined by RNA sequencing (RNA-seq) using next generation sequencing and bioinformatics analysis. A total of 645 genes were found to have significant altered expression in response to salt stress. Expression levels of a selective subset of these genes were chosen and confirmed using quantitative real-time PCR. To the best of our knowledge, this is the first report of saltinduced transcriptome analysis in P. elongata. The current study indicates that differential expression of a select group of genes of P. elongata and their possible roles in pathways and mechanisms related to salt tolerance. Functional characterization of these genes will assist in future investigations of salt tolerance in P. elongata, which could be used to enhance biofuel production.

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Strategies to Mitigate the Salt Stress Effects on Photosynthetic Apparatus and Productivity of Crop Plants

Mbarki

Sytar

Cerdà

et al. 2018

Salinity Responses and Tolerance in Plants, Volume 1

101

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Effects of salinity on the photosynthetic apparatus of two Paulownia lines

Cited by 52 publications

References 41 publications

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

RNA-seq analysis of the salt stress-induced transcripts in fast-growing bioenergy tree, Paulownia elongata

Strategies to Mitigate the Salt Stress Effects on Photosynthetic Apparatus and Productivity of Crop Plants

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