Abstract:
Salinity is one of the crucial abiotic stresses that have an effect on plant growth and development. High salt stress has a negative effect on the entire plant at almost all stages of growth, including germination, seedling, vegetative and reproductive growth. Phytohormones play a crucial role by regulating plant responses to salinity stress that ultimately lead to plant adaptation to harsh environment. Coriandrum sativum is an important medicinal herb and used for the flavoring of different food items such as salad, meat sauce and pickles. The present study was carried out to assess the foliar application of Indole acetic acid on coriander (Coriandrum sativum) to mitigate NaCl and KNO3 salt toxicity. A completely randomized design (CRD) pot experiment was carried out, with six factors and five treatments of varying levels i.e., Control, 50mM(T1), 100mM(T2), 150mM(T3) and 200mM(T4) each with three replicates. The pots were arranged in six blocks, three blocks consisting of five different levels of sodium chloride, potassium nitrate and their combined effect, the other three containing salts along with indole acetic acid (0.5ppm) and their combined effect, separately. The results indicated that coriander has the better mechanism for the salinity stress in terms of morphology and anatomy. Moderate and high salts levels cause a slight reduction in various morphological parameters such as shoot and root length, number of leaves and branches, leaf area, fresh and dry weight while combine dose of salts and IAA showed improvement in morpho-anatomical parameters. Anatomical changes in the increased epidermis cell area, reduced cortical area, thick sclerenchyma, increased metaxylem vessel area and thick endodermis were also observed. It was concluded that high salinity caused ionic imbalance and inhibit water uptake which results in osmotic and ionic stress leading to smaller cell size and cell injury. However, exogenous application of indole acetic acid appeared to mitigate the inhibitory effects of salinity on all of the growth parameters evaluated to various extents, particularly at low salt concentrations (50 mM and 100mM NaCl). In addition, at the highest salinity level of 200 mM NaCl, IAA had little effect. While at KNO3, IAA showed the better effects on morphoanatomical features at maximum salinity levels of 200mM. It might be said that plant growth regulators can be successfully used to increase yield in this economically important seed crop under saline conditions.
Page(s):
134-134
DOI:
DOI not available
Published:
Journal: Abstract Book on Global Science Technology and Management Conference, Volume: 0, Issue: 0, Year: 2023
Keywords:
foliar application
,
indole acetic acid
,
KNO3 salt toxicity
,
Coriander Coriandrum sativum