Seed priming with calcium chloride improves the photosynthesis performance of faba bean plants subjected to cadmium stress

Nouairi, Issam; Jalali, K.; Zribi, Fethia; Barhoumi, Fathi; Zribi, Kais; Mhadhbi, Haythem

doi:10.32615/ps.2019.055

Cited by 30 publications

(11 citation statements)

References 57 publications

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“…Salinity is one of the major obstacles to increasing crop production worldwide. It becomes the principal abiotic stress that negatively affects faba bean during the vegetative and reproductive phases and definitely at grain production (Ali et al 2013, Nouairi et al 2019. The data of our study showed wide genotypic differences in response to salinity (Fig.…”

Section: Discussionmentioning

confidence: 49%

“…These problems contribute to ionic imbalance, the closing of stomata, and reduction in the photosynthetic enzymatic process which affects the growth of the plant (Semida et al 2014). Therefore, the decrease in plant growth might be due to salinity-induced toxicity on photosynthetic apparatus and structural alterations in plants (Nouairi et al 2019). According to our results, tolerant faba bean genotypes were capable to conserve their photosynthesis and biomass and therefore surmount salinity conditions.…”

Section: Discussionmentioning

confidence: 53%

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Photosynthetic and physiological responses of small seeded faba bean genotypes (Vicia faba L.) to salinity stress: identification of a contrasting pair towards salinity

Rajhi¹,

Moussa²,

Neji³

et al. 2020

Photosynt.

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In this study, we examined the behavior of six faba bean (Vicia faba L.) genotypes under salinity conditions at the seedling stage. The evaluation was assessed using 21 morphological, physiological, and photosynthetic traits under control, moderate, and severe salinity conditions. The principal component analysis (PCA) was used to identify genotypes of contrasting behavior in response to salt stress and to characterize the important traits for salt tolerance. The result of PCA analysis showed that the genotypes displayed different behavior under the saline conditions. The most discriminating quantitative characters were related to plant biomass production and photosynthesis, especially the mass of fresh root, number of leaves, water-use efficiency, and the substomatal CO2 concentration. The analysis of all parameters by PCA permits us to distinguish cv. Najeh as the most tolerant genotype for salinity conditions and cv. Chourouk as the most sensitive one. These results would be of pertinent tools in faba bean breeding programs.

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Section: Discussionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 53%

Photosynthetic and physiological responses of small seeded faba bean genotypes (Vicia faba L.) to salinity stress: identification of a contrasting pair towards salinity

Rajhi¹,

Moussa²,

Neji³

et al. 2020

Photosynt.

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“…The plant pigments, including chlorophyll, carotenoids contents were measured as described in previous studies [ 9 , 61 , 62 ] with simple modifications. In brief, 0.1 g fresh leaf was soaked in 15 ml extracting solution and then shook with 50 rpm/min for 24 h under dark condition.…”

Section: Methodsmentioning

confidence: 99%

Cold acclimation can specifically inhibit chlorophyll biosynthesis in young leaves of Pakchoi

Hui-yu

Yuan

et al. 2021

BMC Plant Biol

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Background Leaf color is an important trait in breeding of leafy vegetables. Y-05, a pakchoi (Brassica rapa ssp. chinensis) cultivar, displays yellow inner (YIN) and green outer leaves (GOU) after cold acclimation. However, the mechanism of this special phenotype remains elusive. Results We assumed that the yellow leaf phenotype of Y-05 maybe caused by low chlorophyll content. Pigments measurements and transmission electron microscopy (TEM) analysis showed that the yellow phenotype is closely related with decreased chlorophyll content and undeveloped thylakoids in chloroplast. Transcriptomes and metabolomes sequencing were next performed on YIN and GOU. The transcriptomes data showed that 4887 differentially expressed genes (DEGs) between the YIN and GOU leaves were mostly enriched in the chloroplast- and chlorophyll-related categories, indicating that the chlorophyll biosynthesis is mainly affected during cold acclimation. Together with metabolomes data, the inhibition of chlorophyll biosynthesis is contributed by blocked 5-aminolevulinic acid (ALA) synthesis in yellow inner leaves, which is further verified by complementary and inhibitory experiments of ALA. Furthermore, we found that the blocked ALA is closely associated with increased BrFLU expression, which is indirectly altered by cold acclimation. In BrFLU-silenced pakchoi Y-05, cold-acclimated leaves still showed green phenotype and higher chlorophyll content compared with control, meaning silencing of BrFLU can rescue the leaf yellowing induced by cold acclimation. Conclusions Our findings suggested that cold acclimation can indirectly promote the expression of BrFLU in inner leaves of Y-05 to block ALA synthesis, resulting in decreased chlorophyll content and leaf yellowing. This study revealed the underlying mechanisms of leaves color change in cold-acclimated Y-05.

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“…Slow crop emergence and seedling growth increase the risk of pests and delay crop performance, which adversely affects seed yield. Previous research showed that seed priming with various substances improved faba bean performance under stress conditions [27][28][29]. However, the effect of hydro-priming on faba bean germination and emergence has not been examined, especially under field conditions.…”

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Hydro-Priming Effects on Seed Germination and Field Performance of Faba Bean in Spring Sowing

2019

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Seed priming has been used to advance germination and stand in several crops, but relevant research on faba bean (Vicia faba L.) is scarce. Laboratory and field trials were carried out for two years to study the effect of hydro-priming on faba bean germination and field performance in spring sowing. In laboratory trials, the effects of hydro-priming for 0,8,16,24,36, and 48 h on final germination percentage, germination speed, Timson's germination index, mean germination time, mean daily germination, synchronization index, and seedling vigor index were studied. All hydro-priming treatments improved germination parameters of faba bean seeds, except for final germination percentage and mean daily germination compared with non-primed seeds. Averaged over priming duration treatments, hydro-priming improved germination speed by 16.2%, germination synchrony by 20.7%, and seedling vigor index by 13.4%. All hydro-priming durations improved germination synchrony, while hydro-priming for 8, 16, and 24 h provided the highest values of germination speed (2.56, 2.58, and 2.37 seeds day −1 , respectively). Hydro-priming for 8 and 16 h provided the lowest values of mean germination time (5.81 and 5.96 days, respectively). In field trials, hydro-priming periods of 0, 8, 16, and 24 h were compared. On average, seed hydro-priming did not affect significantly seedling emergence 14 days after sowing in the first year, but significantly improved seedling emergence by 34.4% in the second year. No significant effect of seed hydro-priming was noted in the number of plants at 28 and 35 days after sowing. Seed priming for 8 h resulted in higher fresh weight at anthesis by 22.3% and 8.6% in the first and the second year, respectively, than the non-primed control. Similarly, seed priming for 8 h provided higher seed yield by 12.0% in the first year and by 5.9% in the second year compared with non-primed control. Overall, seed hydro-priming accelerated faba bean germination and seedling emergence, but the magnitude of the response was associated with the environment and was more evident under limited soil moisture after sowing, whereas the beneficial effect of priming was masked when rainfall followed sowing. Similarly, the beneficial effect of priming on seed yield was more pronounced with limited soil moisture after anthesis.2 of 11 achieving high yield. In practice, seed quality loosely reflects the overall value of seed according to its intended purpose that must meet the expectations of the end user [3]. Under field conditions, poor seed quality can delay the onset of germination, adversely affect seedling vigor, and reduce the final crop stand. Establishment rate affects crop density and competitiveness of the crop stand [4], tillering or branching [5], and yield [6] and thus is of great importance. Vigorous plants have high ability to capture resources, can better tolerate pests and plant pathogens, compete with weeds, and are expected to be more tolerant to applied herbicides.Priming is a simple procedure that partially hydrates seed...

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Seed priming with calcium chloride improves the photosynthesis performance of faba bean plants subjected to cadmium stress

Cited by 30 publications

References 57 publications

Photosynthetic and physiological responses of small seeded faba bean genotypes (Vicia faba L.) to salinity stress: identification of a contrasting pair towards salinity

Photosynthetic and physiological responses of small seeded faba bean genotypes (Vicia faba L.) to salinity stress: identification of a contrasting pair towards salinity

Cold acclimation can specifically inhibit chlorophyll biosynthesis in young leaves of Pakchoi

Hydro-Priming Effects on Seed Germination and Field Performance of Faba Bean in Spring Sowing

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