Effect of Bio-stimulants on Yield and Quality of Head Lettuce Grown Under Two Sources of Nitrogen

Shehata, S. M.; Schmidhalter, Urs; Valšíková, Magdaléna; Junge, Helmut

doi:10.1007/s10343-016-0357-5

Cited by 15 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increasing pea yields as a result of using humic acids and compost tea may be attributed to enhancing the growth which mainly due to their high contents of organic and mineral substances with hormone-like activities through their involvement in photosynthesis, proteins synthesis and various enzymatic reactions (Atiyeh et al, 2002 andGad El-Hak et al, 2012). Similar increments in total yields were obtained by Mohajerani et al (2016) on beans, Shehata et al (2016) on lettuce and Yasir et al (2016) on cucumber. The data in Table 7 show that both of pod length and weight of 100 seeds of peas were non-significantly influenced by treatments in both seasons.…”

Section: Effect Of Bio Safe Compounds Resistance Inducers and Fungicsupporting

confidence: 67%

“…They enhanced roots, leaves and shoots growth of many plants as well as stimulate nutrients uptake for major nutrients (Mohajerani et al, 2016). Similarly, Shehata et al (2016) and Yasir et al (2016) showed that HA increased fresh and dry weights of leaves, number of leaves, total yield and improved quality as well as chlorophyll and carotenoid contents of head lettuce and cucumber. Compost tea is applied commercially as a natural fertilizer activator for growth and yield of cucumber and other vegetables as well as to suppress several of diseases as substitutive control (Bayoumi and El-Kot, 2010, Martin and Brathwaite, 2012and Kim et al, 2015.…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Impact of Bio Safe Compounds and Resistance Inducers on Certain Soil Borne Diseases, Growth and Yield of Pea Plants (Pisum sativum L.)

Taha

Bayoumi

Hagag

2017

Journal of Sustainable Agricultural Sciences

View full text Add to dashboard Cite

Section: Effect Of Bio Safe Compounds Resistance Inducers and Fungicsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 95%

Impact of Bio Safe Compounds and Resistance Inducers on Certain Soil Borne Diseases, Growth and Yield of Pea Plants (Pisum sativum L.)

Taha

Bayoumi

Hagag

2017

Journal of Sustainable Agricultural Sciences

View full text Add to dashboard Cite

“…In lettuce, biostimulant application at the nursery level positively affects plant growth by increasing the development of shoots and roots, strongly stimulating root growth and increasing leaf area ( Vernieri et al, 2002 ; Amanda et al, 2009 ). Moreover, a positive role on yield and quality of head lettuce has been reported, with particular regard to the reduction of nitrate that is an important issue for human health ( Shehata et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Borage Extracts As Potential Biostimulant Using a Phenomic, Agronomic, Physiological, and Biochemical Approach

et al. 2017

View full text Add to dashboard Cite

Biostimulants are substances able to improve water and nutrient use efficiency and counteract stress factors by enhancing primary and secondary metabolism. Premise of the work was to exploit raw extracts from leaves (LE) or flowers (FE) of Borago officinalis L., to enhance yield and quality of Lactuca sativa ‘Longifolia,’ and to set up a protocol to assess their effects. To this aim, an integrated study on agronomic, physiological and biochemical aspects, including also a phenomic approach, has been adopted. Extracts were diluted to 1 or 10 mL L–1, sprayed onto lettuce plants at the middle of the growing cycle and 1 day before harvest. Control plants were treated with water. Non-destructive analyses were conducted to assess the effect of extracts on biomass with an innovative imaging technique, and on leaf photosynthetic efficiency (chlorophyll a fluorescence and leaf gas exchanges). At harvest, the levels of ethylene, photosynthetic pigments, nitrate, and primary (sucrose and total sugars) and secondary (total phenols and flavonoids) metabolites, including the activity and levels of phenylalanine ammonia lyase (PAL) were assessed. Moreover, a preliminary study of the effects during postharvest was performed. Borage extracts enhanced the primary metabolism by increasing leaf pigments and photosynthetic activity. Plant fresh weight increased upon treatments with 10 mL L–1 doses, as correctly estimated by multi-view angles images. Chlorophyll a fluorescence data showed that FEs were able to increase the number of active reaction centers per cross section; a similar trend was observed for the performance index. Ethylene was three-fold lower in FEs treatments. Nitrate and sugar levels did not change in response to the different treatments. Total flavonoids and phenols, as well as the total protein levels, the in vitro PAL specific activity, and the levels of PAL-like polypeptides were increased by all borage extracts, with particular regard to FEs. FEs also proved efficient in preventing degradation and inducing an increase in photosynthetic pigments during storage. In conclusion, borage extracts, with particular regard to the flower ones, appear to indeed exert biostimulant effects on lettuce; future work will be required to further investigate on their efficacy in different conditions and/or species.

show abstract

“…Based on the above, the aim of this work was to study the growth pattern during nursery of four genotypes of lettuce (Lactuca sativa L.), the most commonly consumed fresh leafy vegetable and one of the main crops grown under greenhouse conditions (22), in the presence of different degrees of root restriction by the use of different plug cell volumes and a single BAP spray as an attempt to explain the potentially different plantlet sizes at the transplant stage. The hypothesis tested indicate that a single BAP application can override plug cell restriction through an increase in leaf area, shoot biomass accumulation and photo-assimilate partitioning to shoots.…”

Section: Introductionmentioning

confidence: 99%

Root-shoot growth and time to transplant of different lettuce genotypes during nursery

et al. 2021

View full text Add to dashboard Cite

Although vegetable nursery growers decide on plug sizes based on the types, production time and schedule of the crops to grow, they usually choose individual small cell sizes because these allow short plant-raising periods and reduced costs. However, larger plugs produce a finished plant after transplant in a shorter period of time than smaller plugs. Nursery growers end the propagation period when roots take up the plug cell and plantlets can be removed from the plug tray without damage. Thus, this study aimed to investigate the effect of three plug-cell sizes and a single BAP application (100 mg L-1) on the shoot and root growth and time to transplant of different lettuce genotypes. Nursery decreased as plug cell volume increased and with the single BAP spray. A novelty result was that the transplant dates were assigned when the marginal root dry weight accumulation decreased, i.e., based on objective rather than on subjective observations. The significant leaf area and dry weight accumulation found could be explained by growth parameters such as the rate of leaf appearance, the relative rate of leaf area expansion, the relative growth rate, the net assimilation rate and the partition coefficient from root: shoot allometries. Highlights Root restriction due to small plugs in transplant trays delay lettuce transplant. Exogenous cytokinin (BAP) overcame root restriction and decreased time to transplant. Time to transplant can be addressed on an objective basis: it were assigned when the marginal root dry weight accumulation decreased.

show abstract

Effect of Bio-stimulants on Yield and Quality of Head Lettuce Grown Under Two Sources of Nitrogen

Cited by 15 publications

References 18 publications

Impact of Bio Safe Compounds and Resistance Inducers on Certain Soil Borne Diseases, Growth and Yield of Pea Plants (Pisum sativum L.)

Impact of Bio Safe Compounds and Resistance Inducers on Certain Soil Borne Diseases, Growth and Yield of Pea Plants (Pisum sativum L.)

Evaluation of Borage Extracts As Potential Biostimulant Using a Phenomic, Agronomic, Physiological, and Biochemical Approach

Root-shoot growth and time to transplant of different lettuce genotypes during nursery

Contact Info

Product

Resources

About