Abstract
Soil is a medium for plant growth and provides support, minerals and water to the plant for survival. Soil salinity declines availability of water to the plant, affect microorganisms growth, and water drainage capacity of soil, which adversely affect plant growth and development. In the present work the effect of indole-3-acetic acid (IAA) on growth and yield of salinity stressed tomato (Lycopersicon esculentum L.) was studied. Salinity levels (0 [control, no NaCl], 30 and 60 mM of NaCl) were applied to the soil and IAA concentrations (0 [control, no IAA], 100 and 200 ppm) were sprayed on the plants after ten days of salinity treatment. The statistical analysis showed that salt stress conditions adversely affected plant height, branches per plant, stem diameter, fruits per plant, fruit diameter, fruit length, total chlorophyll content, root length, root fresh weight, roots dry weight, and yield per plant, while IAA application to salinity stressed tomato plants rescued the plants and had significantly positive effects on growth and yield of tomato plants. In the light of above results, it is concluded that foliar application of IAA may rescue the salinity stressed tomato plants.
Zusammenfassung
Der Boden ist ein Medium für das Pflanzenwachstum und bietet der Pflanze Unterstützung, Mineralien und Wasser zum Überleben. Der Salzgehalt des Bodens verringert die Verfügbarkeit von Wasser für die Pflanze, beeinträchtigt das Wachstum von Mikroorganismen und die Wasserableitungskapazität des Bodens, was sich negativ auf das Pflanzenwachstum und die Pflanzenentwicklung auswirkt. In der vorliegenden Arbeit wurde die Wirkung von Indol-3-Essigsäure (IES) auf Wachstum und Ertrag von salzgestressten Tomaten (Lycopersicon esculentum L.) untersucht. Der Boden wurde mit verschiedenen Salzgehalten versetzt (0, 30 und 60 mM NaCl) und nach zehn Tagen wurde die Pflanze mit drei unterschiedlichen IES-Konzentrationen (0, 100 und 200 ppm) besprüht. Die statistische Analyse zeigte, dass Salzstress die Pflanzenhöhe, die Äste pro Pflanze, den Stieldurchmesser, die Früchte pro Pflanze, den Fruchtdurchmesser, die Fruchtlänge, den Gesamtchlorophyllgehalt, die Wurzellänge, das Wurzelfrischgewicht, das Wurzeltrockengewicht und die Ertrag pro Pflanze nachteilig beeinflusste. Die IES-Anwendung schützte die Pflanzen und wirkte sich signifikant positiv auf das Wachstum und den Ertrag der Tomatenpflanzen aus. In Anbetracht der obigen Ergebnisse wird der Schluss gezogen, dass die Anwendung von IES auf den Blättern die salzgestressten Tomatenpflanzen schützen kann.
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M. Alam, M.A. Khan, M. Imtiaz, M.A. Khan, M. Naeem, S.A. Shah, Samiullah, S.H. Ahmad and L. Khan declare that they have no competing interests.
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10343_2019_489_MOESM1_ESM.docx
The supplementary data tables show main factors (NaCl concentration and IAA concentrations) effect on corresponding studied parameters as well as the interaction effect of combination treatments. The following tables also show the results of absolute control (0 mM NaCl * 0 ppm IAA) on different studied parameters.
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Alam, M., Khan, M.A., Imtiaz, M. et al. Indole-3-Acetic Acid Rescues Plant Growth and Yield of Salinity Stressed Tomato (Lycopersicon esculentum L.). Gesunde Pflanzen 72, 87–95 (2020). https://doi.org/10.1007/s10343-019-00489-z
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DOI: https://doi.org/10.1007/s10343-019-00489-z