Exogenous Si Alleviation of Autotoxicity in Cucumber (Cucumis sativus L.) Seed Germination is Correlated with Changes in Carbohydrate Metabolism

Bu, Ruifang; Xiao, Xuemei; Liao, Weibiao; Hu, Yunfei; Li, Jing; Lv, Jian; Wang, Ruidong; Xie, Jianming

doi:10.1007/s00344-017-9773-8

Cited by 21 publications

(8 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of this study show that the chlorophyll a, chlorophyll b, chlorophyll a+b, and carotenoid contents of cucumber seedlings (Figure 1A-D) were significantly reduced under CA-induced autotoxicity stress. The exogenous addition of high concentrations (>0.5 mM) of CA can affect most major physiological processes in plants, including seed germination [32], root growth [33], mineral uptake [34], photosynthesis [35], membrane peroxidation, and oxidative stress [36]. In the present study, the chlorophyll and carotenoid contents of cucumber leaves (Figure 1A-D) increased significantly after the addition of exogenous Si.…”

Section: Discussionsupporting

confidence: 49%

Exogenous Si Mitigates the Effects of Cinnamic-Acid-Induced Stress by Regulating Carbon Metabolism and Photosynthetic Pigments in Cucumber Seedlings

et al. 2022

View full text Add to dashboard Cite

(1) Background: Cinnamic acid (CA) is a harmful substance secreted by the roots of continuous-cropping crops. (2) Methods: This study aimed to investigate how exogenous Si affects chlorophyll content and carbon metabolism in cucumber seedlings under CA-induced stress. (3) Results: The levels of chlorophyll a, chlorophyll b, chlorophyll a+b, and carotenoids were significantly reduced due to CA-induced stress. The addition of exogenous Si significantly alleviated this reduction. Under CA-induced stress, exogenous Si significantly increased the activities of ribulose-1,5-bisphosphate carboxylase, glyceraldehyde-3-phosphate dehydrogenase, fructose-1,6-bisphosphatase, fructose-1,6-bisphosphate aldolase, and transketolase. CA-induced stress significantly increased the fructose, glucose, and sucrose contents and reduced the starch content in the leaves and roots of seedlings. Similarly, the sucrose phosphate synthase, sucrose synthase, acid invertase, and neutral invertase activities were significantly reduced in plants under CA-induced stress. Overall, exogenous Si significantly reduced the soluble sugar content, increased the starch content, and promoted sucrose metabolism-related enzymatic activity in seedlings. (4) Conclusion: Exogenous Si can effectively increase the content of photosynthetic pigments in leaves of seedlings and maintain the balance of osmotic potential in the plant by reducing the accumulation of carbon assimilation products, which ultimately promotes tolerance to CA-induced autotoxicity stress.

show abstract

Section: Discussionsupporting

confidence: 49%

Exogenous Si Mitigates the Effects of Cinnamic-Acid-Induced Stress by Regulating Carbon Metabolism and Photosynthetic Pigments in Cucumber Seedlings

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Lastly, silicon was found to be effective against the symptoms of cucumber autotoxicity, an intraspecific allelopathy that limits germination rates, seed vigor, and root growth [123,125].…”

Section: Biostimulants Substances To Increase Cucurbit Resilience To Stressmentioning

confidence: 99%

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

2021

View full text Add to dashboard Cite

Climate change is a pressing matter of anthropogenic nature to which agriculture contributes by abusing production inputs such as inorganic fertilizers and fertigation water, thus degrading land and water sources. Moreover, as the increase in the demand of food in 2050 is estimated to be 25 to 70% more than what is currently produced today, a sustainable intensification of agriculture is needed. Biostimulant substances are products that the EU states work by promoting growth, resistance to plant abiotic stress, and increasing produce quality, and may be a valid strategy to enhance sustainable agricultural practice. Presented in this review is a comprehensive look at the scientific literature regarding the widely used and EU-sanctioned biostimulant substances categories of silicon, seaweed extracts, protein hydrolysates, and humic substances. Starting from their origin, the modulation of plants’ hormonal networks, physiology, and stress defense systems, their in vivo effects are discussed on some of the most prominent vegetable species of the popular plant groupings of cucurbits, leafy greens, and nightshades. The review concludes by identifying several research areas relevant to biostimulant substances to exploit and enhance the biostimulant action of these substances and signaling molecules in horticulture.

show abstract

“… Cheng et al (2016) found that some plant responses to autotoxicity occurred only in the roots, and that the genes relevant to these responses were also expressed only in the roots. However, most studies on autotoxicity stress also focus on leaf photosynthetic parameters, ascorbate-glutathione metabolism, the activities of antioxidant enzymes, and other shoot parameters ( Bu et al, 2018 ; Meng et al, 2021 ; Zhang et al, 2021 ). In the present study, CA stress changed the root morphology of cucumber seedlings, resulting in a significant adverse effect on morphological indicators such as total root length, average root diameter, total root volume, total root surface area, and number of branch roots.…”

Section: Discussionmentioning

confidence: 99%

Exogenous silicon alleviates the adverse effects of cinnamic acid-induced autotoxicity stress on cucumber seedling growth

Lyu

Jin²,

Meng³

et al. 2022

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

Autotoxicity is a key factor that leads to obstacles in continuous cropping systems. Although Si is known to improve plant resistance to biotic and abiotic stresses, little is known about its role in regulating leaf water status, mineral nutrients, nitrogen metabolism, and root morphology of cucumber under autotoxicity stress. Here, we used cucumber seeds (Cucumis sativus L. cv. “Xinchun No. 4”) to evaluate how exogenous Si (1 mmol L−1) affected the leaf water status, mineral nutrient uptake, N metabolism-related enzyme activities, root morphology, and shoot growth of cucumber seedlings under 0.8 mmol L−1 CA-induced autotoxicity stress. We found that CA-induced autotoxicity significantly reduced the relative water content and water potential of leaves and increase their cell sap concentration. CA-induced stress also inhibited the absorption of major (N, P, K, Ca, Mg) and trace elements (Fe, Mn, Zn). However, exogenous Si significantly improved the leaf water status (relative water content and water potential) of cucumber leaves under CA-induced stress. Exogenous Si also promoted the absorption of mineral elements by seedlings under CA-induced stress and alleviated the CA-induced inhibition of N metabolism-related enzyme activities (including nitrate reductase, nitrite reductase, glutamine synthetase, glutamate synthase, glutamate dehydrogenase). Moreover, exogenous Si improved N uptake and utilization, promoted root morphogenesis, and increased the growth indexes of cucumber seedlings under CA-induced stress. Our findings have far-reaching implications for overcoming the obstacles to continuous cropping in cucumber cultivation.

show abstract

Exogenous Si Alleviation of Autotoxicity in Cucumber (Cucumis sativus L.) Seed Germination is Correlated with Changes in Carbohydrate Metabolism

Cited by 21 publications

References 67 publications

Exogenous Si Mitigates the Effects of Cinnamic-Acid-Induced Stress by Regulating Carbon Metabolism and Photosynthetic Pigments in Cucumber Seedlings

Exogenous Si Mitigates the Effects of Cinnamic-Acid-Induced Stress by Regulating Carbon Metabolism and Photosynthetic Pigments in Cucumber Seedlings

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

Exogenous silicon alleviates the adverse effects of cinnamic acid-induced autotoxicity stress on cucumber seedling growth

Contact Info

Product

Resources

About