Biostimulants-Based Amino Acids Augment Physio-Biochemical Responses and Promote Salinity Tolerance of Lettuce Plants (Lactuca sativa L.)

被引:17
作者
Abdelkader, Mostafa [1 ]
Voronina, Luidmila [2 ]
Baratova, Lyudmila [3 ]
Shelepova, Olga [4 ]
Zargar, Meisam [5 ]
Puchkov, Mikhail [6 ]
Loktionova, Elena [7 ]
Amantayev, Bekzad [8 ]
Kipshakbaeva, Assemgul [8 ]
Arinov, Bauyrzhan [8 ]
机构
[1] Sohag Univ, Fac Agr, Hort Dept, Sohag City 1646130, Egypt
[2] Lomonosov Moscow State Univ, Fac Soil Sci, Agrochem Dept, Moscow 119991, Russia
[3] Lomonosov Moscow State Univ, AN Belozersky Inst Physicochem Biol, Moscow 119992, Russia
[4] Russian Acad Sci, NV Tsitsin Main Bot Garden, Plant Physiol & Immun Lab, Moscow 127276, Russia
[5] RUDN Univ, Inst Agr, Dept Agrobiotechnol, Moscow 117198, Russia
[6] Astrakhan State Univ, Lab Select & Seed Prod, Astrakhan 414056, Russia
[7] Astrakhan State Univ, Dept Ecol, Astrakhan 414056, Russia
[8] S Seifullin Kazakh Agrotech Univ, Fac Agron, Astana 010000, Kazakhstan
关键词
salinity stress; biostimulants; vegetable; greenhouse; photosynthesis; protein; NUTRITIONAL QUALITY; FOLIAR APPLICATION; GLYCINE BETAINE; SALT STRESS; ANTIOXIDANT; ACCUMULATION; GROWTH; MODULATION; CULTIVARS; CUCUMBER;
D O I
10.3390/horticulturae9070807
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
Studying the biostimulation effect of amino acids indicated their possible role in salt stress mitigation. In this investigation, six exogenous amino acids (alanine (Ala), arginine (Arg), glutamine (Glu), glycine (Gly), methionine (Met), and proline (Pro)) at 0.5 g/L were sprayed to evaluate their impact on lettuce plants cultivated under simulated salt stress conditions. Photosynthetic pigments, ion absorption, endogenous amino acids contents, catalase (CAT), and peroxidase (POD) enzyme activities were determined. A significant alleviation of salt stress was noticed when EAAs were used in the stress-induced plants, and applying Gly, Met, and Pro improved the plant status under salt stress conditions. The highest electric conductivity (568 & mu;S/g) was testified from the control treatment (50 mM NaCl), while applying exogenous amino acids reduced electrical conductivity (EC), and the result was located between 469 and 558 & mu;S/g. AAs alleviated Cl- anions in the lettuce leaves by 25% in comparison to control plants. Na+ cations were alleviated when the stress-induced plants were sprayed with amino acids. In contrast, applying amino acids promoted K+ uptake, and Arg presented the highest contents (3226 & mu;g/g). AAs promoted chlorophyll (chl a and chl b) concentrations compared to the control treatment, and Met produced the maximum chl a content, while the carotene (car) contents significantly augmented when Gly, Met, and Pro were applied. AAs were highly generated in non-stressed treatment (Std) compared to the control. Under simulated salinity stress, Met and Pro application enhanced proteinogenic amino acids expression. Compared to Ctl treatment, peroxidase enzyme activities significantly diminished in the other treatments, which fell by over 40% when Gly, Met, and Pro were sprayed.
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页数:15
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