Response of four olive (Olea europaea L.) cultivars to six B concentrations: Growth performance, nutrient status and gas exchange parameters

2010 ◽  
Vol 127 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Christos Chatzissavvidis ◽  
Ioannis Therios
Keyword(s):  
Gas Exchange ◽  
Growth Performance ◽  
Olea Europaea ◽  
Nutrient Status ◽  
Gas Exchange Parameters ◽  
Olea Europaea L ◽  
Exchange Parameters ◽  
Olea Europaéa

scholarly journals Relations Between Mn Concentration and Yield, Nutrient, Water Status, and Gas Exchange Parameters of Tomato

2015 ◽  
Vol 56 (2) ◽  
pp. 98-106
Author(s):  
Tomasz Kleiber ◽  
Klaudia Borowiak ◽  
Anna Budka ◽  
Dariusz Kayzer
Keyword(s):  
Gas Exchange ◽  
Photosynthetic Activity ◽  
Water Status ◽  
Nutrient Status ◽  
Nutrient Content ◽  
Gas Exchange Parameters ◽  
Tomato Yield ◽  
Relative Water ◽  
Mn Concentration ◽  
Exchange Parameters

Abstract Nutrition is one of the most important factors influencing quantitative and qualitative plant yield. This study examined the effect of manganese (Mn) in nutrient solution on photosynthetic activity parameters, and the relations between photosynthetic activity parameters, yield and plant nutrient status in tomato (Solanum lycoper-sicum L.). Mn supplementation significantly modified the nutrient content of leaves. Macronutrient content var-ied less than micronutrient content. The optimal Mn concentration differed between the studied cultivars. Both Mn deficit and Mn excess caused a decrease of tomato yield. Gas exchange parameters, relative water content (RWC) and specific leaf area (SLA) were measured in fully expanded tomato leaves. Certain levels of Mn were found to be needed for proper plant function and future yield, and toxic effects of excess Mn were noted. Changes in PN (net photosynthetic rate) were found to be the first signal of plant response to higher Mn supply, while yield was as for optimal Mn concentrations. Under Mn treatment, uptake of some nutrients increased. A higher level of absorbed Mg led to a higher photosynthesis rate and increased stomatal opening. PN and gs (stomatal con-ductance) also increased, while Ci (intercellular CO2 concentration) decreased, indicating proper CO2 consumption during the assimilation process.

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