Photosynthetic characteristics combined with metabolomics analysis revealed potential mechanisms of cucumber (Cucumis sativus) yield reduction induced by different phosphorus stresses

Wang, Shuang; Zheng, Shiwei; Bian, Ting; Wu, Tong; Li, Xiaoxia; Fu, Hongdan; Sun, Zhouping; Li, Tianlai

doi:10.1016/j.scienta.2022.111156

Cited by 9 publications

(4 citation statements)

References 58 publications

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“…It was evident that phosphorus content significantly affected the level of light saturation point during severe drought stress. Previous studies have shown that phosphorus is an important element involved in photosynthesis, while drought reduced the important substrate of photosynthetic reactions, which was water ( Wang et al., 2022 ). Under the dual stress of severe drought and phosphorus deficiency, the saturation point of photosynthetic reactions was lower, indicating that this indicator was more severely affected than under other treatments.…”

Section: Discussionmentioning

confidence: 99%

Response of Carex breviculmis to phosphorus deficiency and drought stress

et al. 2023

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IntroductionThe drought and phosphorus deficiency have inevitably become environmental issues globally in the future. The analysis of plants functional trait variation and response strategies under the stress of phosphorus deficiency and drought is important to explore their ability to respond to potential ecological stress.MethodsIn this study, Carex breviculmis was selected as the research object, and a 14-week pot experiment was conducted in a greenhouse, with two phosphorus treatment (add 0.5mmol/L or 0.05μmol/L phosphorus) and four drought treatment (add 0-5%PEG6000), totaling eight treatments. Biomass allocation characteristics, leaf anatomical characteristics, biochemical parameters, root morphology, chemical element content, and photosynthetic parameters were measured.ResultsThe results showed that the anatomical characteristics, chemical elements, and photosynthetic parameters of Carex breviculmis responded more significantly to main effect of phosphorus deficiency. Stomatal width, leaf phosphorus content and maximum net photosynthetic rate decreased by 11.38%, 59.39%, 38.18% significantly (p<0.05), while the change in biomass was not significant (p>0.05). Biomass allocation characteristics and root morphology responded more significantly to main effect of drought. Severe drought significantly decreased leaf fresh weight by 61% and increased root shoot ratio by 223.3% compared to the control group (p<0.05). The combined effect of severe drought and phosphorus deficiency produced the highest leaf N/P ratio (291.1% of the control) and MDA concentration (243.6% of the control). Correlation analysis and redundancy analysis showed that the contributions of phosphorus and drought to functional trait variation were similar. Lower epidermal cell thickness was positively correlated with maximum net photosynthetic rate, leaf phosphorus, chlorophyll ab, and leaf fresh weight (p<0.05).DiscussionIn terms of response strategy, Carex breviculmis was affected at the microscopic level under phosphorus deficiency stress, but could maintain the aboveground and underground biomass well through a series of mechanisms. When affected by drought, it adopted the strategy of reducing leaf yield and improving root efficiency to maintain life activities. Carex breviculmis could maintain its traits well under low phosphorus and moderate drought, or better conditions. So it may have good ecological service potential in corresponding areas if promoted. This study also provided a reference for plant response to combined drought and phosphorus deficiency stresses.

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Section: Discussionmentioning

confidence: 99%

Response of Carex breviculmis to phosphorus deficiency and drought stress

et al. 2023

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“…Mineral deficiency affects photosynthetic parameters [15,28]. An optimal ion influx by roots allows increased CO 2 fixation and improves the photosynthesis rate in the scion [29,30]. Herein, we focused on the effects of calcium concentration levels on photosynthetic parameters.…”

Section: Discussionmentioning

confidence: 99%

Improving Bell Pepper Crop Performance and Fruit Quality under Suboptimal Calcium Conditions by Grafting onto Tolerant Rootstocks

et al. 2022

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Calcium deficiency or its inefficient translocation to pepper fruits leads to considerable economic loss by reducing the number of marketable fruits. The present study proposes grafting as an environmentally friendly technique to effectively reduce such loss. A commercial variety (Al-cudia F1; V) was grafted onto two pepper (Capsicum annum L.) accessions (V/A6 and V/A8), a hybrid rootstock (V/N) and was also self-grafted (V/V). All rootstock–scion combinations were cultivated under greenhouse conditions with optimal and suboptimal Ca supply and assessed for fruit yield and biomass production, gas exchange and chlorophyll fluorescence, mineral concentration in leaves and fruits as well as several fruit quality parameters. The V/N plants demonstrated an enhanced capacity for increased biomass, higher yield and number of commercial fruits and greater mean fruit weight compared with the other rootstock–scion combinations. These improvements are attributed primarily to increased intrinsic water efficiency. Additionally, a significantly higher Ca concentration in leaves was found under suboptimal Ca conditions in the V/N combination than that found in the other rootstock–scion combinations indicating a higher capacity for Ca uptake and translocation. Under the same conditions, the concentration of organic acids in fruits, such as citric and tartaric, which impact the organoleptic quality, was also higher in V/N plants. Consequently, we can conclude that grafting pepper onto tolerant rootstocks is a successful tool for ameliorating the negative impact of suboptimal Ca conditions on pepper crop performance and fruit quality.

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“…Nevertheless, an increase in Ci in this result demonstrates a clear dawn inhibition of photosynthesis, due to the lack of P carriers, strongly evidencing that the stomatal limitation is not imposing any barrier to the entry of CO 2 . Previous studies have shown that the reduction in the stomatal conductance limits the diffusion of CO 2 necessary for carboxylation reactions, thus reducing Pn [36].…”

Section: Effects Of the Low Availability Of P On The Enzymes Related ...mentioning

confidence: 99%

Phosphorus Availability Affects the Photosynthesis and Antioxidant System of Contrasting Low-P-Tolerant Cotton Genotypes

et al. 2023

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Phosphorus (P) is an essential macronutrient, and an important component of plant metabolism. However, little is known about the effects of low P availability on P absorption, the photosynthetic electron transport chain, and the antioxidant system in cotton. This study used cotton genotypes (sensitive FJA and DLNTDH and tolerant BX014 and LuYuan343) with contrasting low-P tolerance in a hydroponic experiment under 15 µM, 50 µM, and 500 μM P concentrations. The results showed that low P availability reduced plant development and leaf area, shoot length, and dry weight in FJA and DLNADH, compared to BX014 and LuYuan343. The low P availability decreased the gas-exchange parameters such as the net photosynthetic rate, transpiration rate, and stomatal conductance, and increased the intercellular CO2 concentration. Chlorophyll a fluorescence demonstrated that the leaves’ absorption and trapped-energy flux were largely steady. In contrast, considerable gains in absorption and trapped-energy flux per reaction center resulted from decreases in the electron transport per reaction center under low-P conditions. In addition, low P availability reduced the activities of antioxidant enzymes and increased the content of malondialdehyde in the cotton genotypes, especially in FJA and DLNTDH. Moreover, low P availability reduced the activity of PEPC and generated a decline in the content of ATP and NADPH. Our research can provide a theoretical physiological basis for the growth and tolerance of cotton under low-P conditions.

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Photosynthetic characteristics combined with metabolomics analysis revealed potential mechanisms of cucumber (Cucumis sativus) yield reduction induced by different phosphorus stresses

Cited by 9 publications

References 58 publications

Response of Carex breviculmis to phosphorus deficiency and drought stress

Response of Carex breviculmis to phosphorus deficiency and drought stress

Improving Bell Pepper Crop Performance and Fruit Quality under Suboptimal Calcium Conditions by Grafting onto Tolerant Rootstocks

Phosphorus Availability Affects the Photosynthesis and Antioxidant System of Contrasting Low-P-Tolerant Cotton Genotypes

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