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Reducing the salinity impact on soilless culture of tomatoes using supplemental Ca and foliar micronutrients

100%

Saleh S., Liu G., Liu M., Liu W., Gruda N., He H.

Acta Scientiarum Polonorum. Hortorum Cultus

2019

tom 18

nr 3

Salt stress is known as one of the most severe abiotic factors limiting the plant production all over the world. In this study, three additives: (i) supplemental Ca (5 mmol L–1) to nutrient solution, (ii) foliar application of micronutrients (Fe, Mn and Zn at 60, 160 and 110 mg L–1, respectively), and (iii) combination of both of them were evaluated aiming to reduce the negative impact of salt stress on tomato plants cultivated in a soilless culture and improve the internal quality of fruits. The obtained results show that salinity reduced vegetative growth and physiological parameters, fruit yield and its components, and even more lowered fruit market classification of tomatoes. Salinity treatment reduced most of essential macro- and micronutrients in tomato fruit, whilst Na content was increased. Tomato productivity and fruit quality were ameliorated under saline conditions by increasing Ca into nutrient solution and applying a foliar application of micronutrients. A combination of both additives ranked the first to alleviate the adverse effects of salinity on tomatoes, followed by solo supplemental Ca into saline nutrient solution. On the other hand, the internal fruit quality of antioxidant compounds, such as vitamin C, lycopene, α-carotene, β-carotene and lutein as well as acidity, total soluble solid and dry matter percent, were increased under saline conditions.

Influence of salinity on growth and organic compounds content of carrot (Daucus carota L.)

88%

Shiyab S., Al-Qarallah B., Akash M.

Acta Scientiarum Polonorum. Hortorum Cultus

2019

tom 18

nr 6

Carrot production of valuable carotenes, carbohydrate and protein are hindered by elevated salinity levels in many parts of the world. To assess this problem, germination and growth of two carrot cultivars (Daucus carota cvs Jordan and Napoli) were studied in vivo and in vitro under different salt stress concentrations (0, 75, and 150 mM NaCl). Seeds were directly or gradually exposed to these salt concentrations. With elevated salinity levels, significant reductions in growth parameters (dry shoot weight, fresh shoot weight, shoot length, root length, and root number) were observed. Also, significant difference in germination percentage was observed at 150 mM NaCl in both cultivars when compared with control treatment (90% germination percentage in Napoli and 71% in Jordan cultivar). Growth rate, tolerant index, and relative water content (RWC) declined as salinity increased. The 150 mM NaCl salinity treatment significantly reduced the shoot chlorophyll and protein content, but increased carbohydrate content. Lesser impairment by the gradual exposure of seedling to salinity provides an opportunity to study the acquirement of salt tolerance.

Ograniczanie wyników

2 Acta Scientiarum Polonorum. Hortorum Cultus

1 Akash M.

1 Al-Qarallah B.

1 Gruda N.

1 He H.

1 Liu G.

1 Liu M.

1 Liu W.

1 Saleh S.

1 Shiyab S.

2 2019

Wyniki wyszukiwania

Reducing the salinity impact on soilless culture of tomatoes using supplemental Ca and foliar micronutrients

Influence of salinity on growth and organic compounds content of carrot (Daucus carota L.)