Leaf arginine spraying improves leaf gas exchange under water deficit and root antioxidant responses during the recovery period

Silveira, Neidiquele M.; Ribeiro, Rafael Vasconcelos; Morais, Sabrina F.N. de; Souza, Sarah Caroline Ribeiro de; Silva, Simone F. da; Seabra, Amedea B.; Hancock, John T.; Machado, Eduardo Caruso

doi:10.1016/j.plaphy.2021.02.036

Cited by 22 publications

(12 citation statements)

References 68 publications

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“…As Leafamine ® does not contain putrescine, its synthesis could be endogenously triggered by this kind of biostimulant in lettuce. In con-sistence with this, it is unlikely that arginine-a component of Leafamine ® -may explain the increased putrescine level detected in Leafamine ® -treated lettuce, because leaf arginine spraying only had minor effects on the polyamine levels of sugarcane plants subjected to water deficit [49]. It has been observed that vegetal-derived protein hydrolysates treatment caused accumulation of polyamines (namely sinapoyltyramine and triferuloyl spermidine) in tomato plants [50].…”

Section: Discussionmentioning

confidence: 99%

Leafamine®, a Free Amino Acid-Rich Biostimulant, Promotes Growth Performance of Deficit-Irrigated Lettuce

Malécange

Pérez-Garcia

Citerne

et al. 2022

IJMS

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Water deficit causes substantial yield losses that climate change is going to make even more problematic. Sustainable agricultural practices are increasingly developed to improve plant tolerance to abiotic stresses. One innovative solution amongst others is the integration of plant biostimulants in agriculture. In this work, we investigate for the first time the effects of the biostimulant –Leafamine®–a protein hydrolysate on greenhouse lettuce (Lactuca sativa L.) grown under well-watered and water-deficit conditions. We examined the physiological and metabolomic water deficit responses of lettuce treated with Leafamine® (0.585 g/pot) or not. Root application of Leafamine® increased the shoot fresh biomass of both well-watered (+40%) and deficit-irrigated (+20%) lettuce plants because the projected leaf area increased. Our results also indicate that Leafamine® application could adjust the nitrogen metabolism by enhancing the total nitrogen content, amino acid (proline) contents and the total protein level in lettuce leaves, irrespective of the water condition. Osmolytes such as soluble sugars and polyols, also increased in Leafamine®-treated lettuce. Our findings suggest that the protective effect of Leafamine is a widespread change in plant metabolism and could involve ABA, putrescine and raffinose.

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Section: Discussionmentioning

confidence: 99%

Leafamine®, a Free Amino Acid-Rich Biostimulant, Promotes Growth Performance of Deficit-Irrigated Lettuce

Malécange

Pérez-Garcia

Citerne

et al. 2022

IJMS

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“…Silveira et al [49] point out that resistances related to water flow in the soil-plant-atmosphere system cause disharmony between water absorption and transpiration. These authors also emphasize that the partial closure of the stomata is a maneuver to prevent excessive dehydration or a leaf water imbalance, which, consequently, would lead to a reduction in the photosynthetic rate.…”

Section: Resultsmentioning

confidence: 99%

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

Sousa

Freire

2022

JEAI

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Aims: This objective of this work was to evaluate the effects of water deficiency on physiological aspects of oiticica plants, as well as the capacity of potassium fertilization to attenuate such effects. Study Design: The treatments were distributed in an entirely randomized design (DIC), consisting of a 4x4 factorial, with four levels of potassium (K) and four water turning, with five repetitions. Place and Duration of Study: The experiment was conducted in a shaded environment, with 50% light interception, in the Forest Nursery of UAEF/UFCG, between January 2020 and July 2020. Methodology: The relative water content (RWC), transpiration (E) and photosynthesis (A) rates, stomatal conductance (gs), and internal CO2 concentration (Ci) were evaluated, and from the values of A and E, the intrinsic water use efficiency (EUAi) was calculated and, with the data of A and Ci, the carboxylation efficiency (A/Ci). Results: There was significant interaction of treatments in the parameters RWC, E, gs, A and EUAi and isolated effect of water turning on Ci and A/Ci. Irrigation daily or every five days provided the maintenance of higher water status and better stomatal behavior, and the plants were sensitive to water stress provided by longer water turnings (every 10 and 15 days). The fertilization with 100 and 150 mg dm-3 of K kept the values of E and A high, even under low water availability. Conclusion: Potassium fertilization proved to be effective in attenuating the negative effects caused by water deficiency on gas exchange and WUEi of the seedlings, with highlights for 100 and 150 mg dm-3 of K levels.

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“…Asp catabolism leads to Arg biosynthesis, essential for plant defense, supplying precursors for many signaling molecules (e.g., NO and polyamines) against abiotic and biotic stress. The potential benefits of Arg were provided frequently in the biomass and adaptation to multiple stress exposure [ 116 , 117 , 118 , 119 ]. However, Arg levels in plant tissues appear to be modulated by complicated mechanisms because most of the experimental manipulations of Arg metabolism did not significantly alter Arg production [ 17 ].…”

Section: Discussionmentioning

confidence: 99%

New Insight into Aspartate Metabolic Pathways in Populus: Linking the Root Responsive Isoenzymes with Amino Acid Biosynthesis during Incompatible Interactions of Fusarium solani

Han

et al. 2022

IJMS

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Integrating amino acid metabolic pathways into plant defense and immune systems provides the building block for stress acclimation and host-pathogen interactions. Recent progress in L-aspartate (Asp) and its deployed metabolic pathways highlighted profound roles in plant growth and defense modulation. Nevertheless, much remains unknown concerning the multiple isoenzyme families involved in Asp metabolic pathways in Populus trichocarpa, a model tree species. Here, we present comprehensive features of 11 critical isoenzyme families, representing biological significance in plant development and stress adaptation. The in silico prediction of the molecular and genetic patterns, including phylogenies, genomic structures, and chromosomal distribution, identify 44 putative isoenzymes in the Populus genome. Inspection of the tissue-specific expression demonstrated that approximately 26 isogenes were expressed, predominantly in roots. Based on the transcriptomic atlas in time-course experiments, the dynamic changes of the genes transcript were explored in Populus roots challenged with soil-borne pathogenic Fusarium solani (Fs). Quantitative expression evaluation prompted 12 isoenzyme genes (PtGS2/6, PtGOGAT2/3, PtAspAT2/5/10, PtAS2, PtAspg2, PtAlaAT1, PtAK1, and PtAlaAT4) to show significant induction responding to the Fs infection. Using high-performance liquid chromatography (HPLC) and non-target metabolomics assay, the concurrent perturbation on levels of Asp-related metabolites led to findings of free amino acids and derivatives (e.g., Glutamate, Asp, Asparagine, Alanine, Proline, and α-/γ-aminobutyric acid), showing marked differences. The multi-omics integration of the responsive isoenzymes and differential amino acids examined facilitates Asp as a cross-talk mediator involved in metabolite biosynthesis and defense regulation. Our research provides theoretical clues for the in-depth unveiling of the defense mechanisms underlying the synergistic effect of fine-tuned Asp pathway enzymes and the linked metabolite flux in Populus.

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Leaf arginine spraying improves leaf gas exchange under water deficit and root antioxidant responses during the recovery period

Cited by 22 publications

References 68 publications

Leafamine®, a Free Amino Acid-Rich Biostimulant, Promotes Growth Performance of Deficit-Irrigated Lettuce

Leafamine®, a Free Amino Acid-Rich Biostimulant, Promotes Growth Performance of Deficit-Irrigated Lettuce

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

New Insight into Aspartate Metabolic Pathways in Populus: Linking the Root Responsive Isoenzymes with Amino Acid Biosynthesis during Incompatible Interactions of Fusarium solani

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