GROWTH, ION CONTENTS AND PHOTOSYNTHESIS OF SALT-SENSITIVE AND LESS SALT-SENSITIVE CUCURBITS TREATED WITH SILICONGROWTH, ION CONTENTS AND PHOTOSYNTHESIS OF SALT-SENSITIVE AND LESS SALT-SENSITIVE CUCURBITS TREATED WITH SILICON

Authors

  • MUHAMMAD NAJIB OTHMAN GHANI Gene Bank & Seed Centre, Persiaran MARDI-UPM, MARDI Headquarters, 43400, Serdang, Selangor; Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor
  • YAHYA AWANG Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor
  • MOHD FIRDAUS ISMAIL Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor

Keywords:

salt stress, silicon, Cucurbitaceae

Abstract

A study was carried out to evaluate the role of silicon in alleviating NaCl salinity effects on both salt-sensitive (cucumber) and less salt-sensitive (bitter gourd) cucurbit. The species were subjected to two levels of NaCl (0, 50 mM) and three silicon concentrations (0, 50, 100 mg L-1 sodium silicate) and data on growth, Na and Cl concentration of leaves, net photosynthesis (Pn) and stomatal conductance (gs) were collected. When treated with 100 mg L-1 silicon, growth of salt-stressed and non- salt stressed plants for both species was significantly improved, with more beneficial effects recorded on the salt-stressed plants and salt-sensitive species. Plants treated with 50 mg L-1 silicon had 11.11% significantly lower Na+ ion in leaf compared to 0 mg L-1 silicon, regardless of species and salinity condition. Treatment of silicon at 100 mg L-1 also significantly increased net photosynthesis and stomatal conductance by 12.13 and 30.14%, respectively. However, no significant beneficial effect of silicon in reducing Cl concentration was recorded. In conclusion, application of silicon can alleviate salinity stress in both salt-sensitive species (cucumber) and less salt-sensitive species (bitter gourd) by reducing sodium toxicity and increasing photosynthetic activity which evident in improvement of growth parameters.

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Published

25-05-2018

How to Cite

GHANI, M. N. O. ., AWANG, Y., & ISMAIL, M. F. (2018). GROWTH, ION CONTENTS AND PHOTOSYNTHESIS OF SALT-SENSITIVE AND LESS SALT-SENSITIVE CUCURBITS TREATED WITH SILICONGROWTH, ION CONTENTS AND PHOTOSYNTHESIS OF SALT-SENSITIVE AND LESS SALT-SENSITIVE CUCURBITS TREATED WITH SILICON. Malaysian Applied Biology, 47(2), 25–31. Retrieved from https://jms.mabjournal.com/index.php/mab/article/view/1942