Journal
PLANTS-BASEL
Volume 12, Issue 21, Pages -Publisher
MDPI
DOI: 10.3390/plants12213784
Keywords
calcium; cold-responsive genes; low-temperature stress; priming; wheat
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Exogenous Ca2+ has been shown to enhance stress tolerance in wheat by increasing photosynthesis and antioxidant capacity, reducing cell membrane damage, and inducing the upregulation of endogenous Ca2+ content and related genes.
Low-temperature stress during stem elongation is a major factor limiting wheat yield. While calcium (Ca2+) is known to enhance stress tolerance, it's potential as an alternative to cold priming and the underlying mechanisms in wheat remains unclear. The current study assessed the effects of exogenous Ca2+ and calcium inhibitors on wheat growth and related physiology mechanisms under low-temperature stress. The results revealed that exogenous Ca2+ increased photosynthesis and antioxidant capacity, lowered cell membrane damage, and ultimately enhanced tolerance to low-temperature stress during the stem elongation stage, compared with the non-exogenous Ca2+ treatment. Moreover, exogenous Ca2+ induced endogenous Ca2+ content and triggered the upregulation of Ca2+ signaling and cold-responsive related genes. This study highlights the significance of exogenous Ca2+ in enhancing stress tolerance and contributing to wheat yield improvement under low-temperature stress.
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