Effects of methyl jasmonate application on nitrogen and proline metabolism in rice plants under aluminium toxicity
Soodabe Esmaielzadeh
1
(
Department of Agronomy, Islamic Azad University of Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
)
Hormoz Fallah
2
(
Department of Agronomy, Islamic Azad University of Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
)
Yousof Niknejad
3
(
Department of Agronomy, Islamic Azad University of Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
)
Mehran Mahmoudi
4
(
Department of Agronomy, Islamic Azad University of Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
)
Davood Barari Tari
5
(
Effects of different concentrations of lead on some biochemical and physiological parameters of rice
)
Keywords: Aluminium stress, Methyl jasmonate, Nitrogen metabolism, Proline metabolism, Stomatal conductance.,
Abstract :
Aluminum (Al) stress is known as a serious threat to the growth and production of crops in acidic soils. Here, the effects of different concentrations of methyl jasmonate (MJ, 0, 0.5 and 1 µM) on rice plants were investigated hydroponically under different concentrations of Al (0, 0.5 and 1 mM). The results showed that the application of aluminium treatments by increasing the accumulation of aluminium in the leaves caused a decrease in stomatal conductance and damage to the performance of the photosynthetic apparatus, which was associated with a decrease in the growth and biomass of rice plants. Aluminium stress also induced a decrease in nitrogen assimilation in rice leaves by disrupting nitrogen metabolism. However, the exogenous application of methyl jasmonate by modulating the metabolism of proline and increasing the internal level of proline caused the protection of photosynthetic pigments under aluminium toxicity. Methyl jasmonate increased the performance of photosynthetic apparatus in Al-stressed plants by improving stomatal conductance. The application of methyl jasmonate by improving the activity of enzymes involved in nitrogen metabolism, increased nitrogen assimilation and improved the adaptation of rice plants under aluminium toxicity. The results of the present research add to our understanding of how methyl jasmonate works in improving plant tolerance to aluminium toxicity and its application in sustainable agriculture.