Application of biostimulants in tomato subjected to water deficit: Physiological, enzymatic and production responses

ABSTRACT The objective of this study was to evaluate the effect of the application of the biostimulants Seed+ and Crop+ on physiological and production variables and on the activity of antioxidant enzymes (superoxide dismutase - SOD and guaiacol peroxidase - POD) in tomato plants subjected to two soil water conditions. The experiment was carried out in a greenhouse, in a 2 x 2 x 6 factorial scheme, with two times of application of the biostimulants (flowering and fruiting), two soil water conditions (50 and 100% of soil water holding capacity) and six biostimulants (control treatment; Seed+; Seed+ + Crop+ 1x; Seed+ + Crop+ 2x; Crop+ 1x; + Crop+ 2x). The exprimental design was completely randomized, with four repetitions. The biostimulants Seed+ and Crop+ increased the quantum yield of photosystem II (Fv/Fm), regardless of the time of application and water condition of the soil. The biostimulants Seed+ + Crop+ 2x and Crop+ 2x stood out in the pre-morning period, with an average Fv/Fm of 0.813, under the conditions tested. The highest SOD activity (372.12 U mg-1 of protein) was obtained with Crop+ 2x biostimulant in fruiting and under water deficit. For POD, when under water deficit, the best results were obtained with the biostimulants Seed+ + Crop+ 2x, Crop+ 1x and Crop+ 2x in flowering (810.94; 691.19 and 921.59 U mg-1 protein) and in fruiting (703.60; 800.00 and 972.62 U mg-1 protein). Thus, the use of Seed+ and Crop+ biostimulants can be an alternative to help mitigate the damage caused by water deficit in tomato crop.

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Effects of arbuscular mycorrhizal fungi on maize nitrogen uptake strategy under different soil water conditions

Plant and Soil ◽

10.1007/s11104-021-04972-3 ◽

2021 ◽

Author(s):

Yingjie Wu ◽

Chongjuan Chen ◽

Jiazhu Li ◽

Guoan Wang

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Soil Water ◽

Nitrogen Uptake ◽

Mycorrhizal Fungi ◽

Arbuscular Mycorrhizal ◽

Water Conditions ◽

Soil Water Conditions

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RESPONSE OF PEAS TO ENVIRONMENT: IV. EFFECT OF FIVE SOIL WATER REGIMES ON GROWTH AND DEVELOPMENT OF PEAS

Canadian Journal of Plant Science ◽

10.4141/cjps68-025 ◽

1968 ◽

Vol 48 (2) ◽

pp. 129-137 ◽

Cited By ~ 14

Author(s):

A. R. Maurer ◽

H. F. Fletcher ◽

D. P. Ormrod

Keyword(s):

Water Stress ◽

Soil Water ◽

Growth And Development ◽

Dry Matter ◽

Fresh Weight ◽

Water Regimes ◽

Severe Water Stress ◽

Water Conditions ◽

Before And After ◽

Soil Water Conditions

Pea plants growing in "weighing lysimeters" were subjected to five soil-water regimes to determine their response to varying conditions of soil water imposed at different stages of development. Plants subjected to a minimal water stress developed luxuriantly and continued to grow up to the harvest period. Pea yield and plant height were not reduced, but fresh weight and dry matter were less if irrigation was applied when soil water fell to 60% rather than 88% of that available. A severe water stress after blossom reduced pea yield, irrespective of soil-water conditions prior to blossom. Plants which had been given ample soil water before blossom wilted visibly when a severe stress was imposed in the post-blossom period, yet wilting did not occur in plants subjected to severe water stress both before and after blossom. Severe water stress prior to blossom did not cause a decrease in pea yield if ample soil moisture was made available after blossom.

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Spatial Distribution of Cell Division Rate Can Be Deduced from that of p34cdc2 Kinase Activity in Maize Leaves Grown at Contrasting Temperatures and Soil Water Conditions

PLANT PHYSIOLOGY ◽

10.1104/pp.124.3.1393 ◽

2000 ◽

Vol 124 (3) ◽

pp. 1393-1402 ◽

Cited By ~ 75

Author(s):

Christine Granier ◽

Dirk Inzé ◽

François Tardieu

Keyword(s):

Spatial Distribution ◽

Cell Division ◽

Soil Water ◽

Kinase Activity ◽

Division Rate ◽

Cell Division Rate ◽

Water Conditions ◽

Maize Leaves ◽

Soil Water Conditions

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ОКРЕМІ ПИТАННЯ АНАЛІЗУ УШКОДЖЕНЬ БУДІВЕЛЬНИХ ОБ’ЄКТІВ ВЕЛИКОЇ ПЛОЩІ

Ресурсоекономні матеріали, конструкції, будівлі та споруди ◽

10.31713/budres.v0i36.286 ◽

2018 ◽

pp. 356-364

Author(s):

Марек Дохойда ◽

Йоанна Вітковска-Добрев

Keyword(s):

Soil Water ◽

Expansion Joints ◽

Concrete Shrinkage ◽

Design And Implementation ◽

Water Conditions ◽

Complex Engineering ◽

Soil Water Conditions ◽

Bottom Slab

У роботі представлений перелік проблем, що супроводжують будівельні об'єкти великої площі, в тому числі й підземні гаражі. Здійснено технічний аналіз окремих проблем, що виникають в таких будівлях під час їх експлуатації. Проектування, а пізніше і будівництво підземних гаражів найчастіше, пов'язане з вирішеням складних інженерних питань. Згідно з ними до найпоширеніших конструкційних недоліків у підземних гаражах віднесні: тріщини нижньої плити, порушення поверхових перекриттів, невластиве кручення бетону, відсутність дилатації або також помилково прийняті ґрунтово-водні умови.The paper concerns complex engineering challenges associated with multi-storey underground car parks. An analysis of selected issues in underground garages during the exploitation was performed. The design and implementation of structures of which function are underground garages is most often associated with serious engineering challenges. For structural reasons frequently occurring faults in garages may include fracture of the bottom slab and intermediate floors resulting from improper design of reinforcement, concrete shrinkage, lack of expansion joints or incorrectly adopted soil-water conditions.

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