Hormone-like action of a natural lipid, lysophosphatidylethanolamine (Zienab Ahmed)
Lysophosphatidylethanolamine (LPE) is the breakdown product of a class of phospholipids found in membranes. LPE is an important bio-regulator in plants and animals and has been found to play a critical role in plant growth and development. LPE speeds up ripening and delays aging in plants by two different mechanisms.
The aim of the present study was to understand the mechanism of hormonal action of LPE and test the possibility of maintaining apical dominance and promoting plant root growth of potato shoot culture by including LPE in the root zone. LPE inclusion in the media improved the overall growth of plants compared to the control. LPE affected root growth by increasing the number and length of adventitious roots initiated at the base of the cultured stem cuttings. LPE also mitigated the calcium deficiency symptoms on cultured potato plants by reducing shoot tip damage and axillary shoot development.
LPE may have mitigated calcium deficiency symptoms by increasing root growth that, in turn, increased calcium uptake by the shoot, which reduced injury to the shoot apex and maintained apical dominance. Because apical dominance and root development are regulated by auxin, we suggest that LPE may have the potential to act in a similar way to this hormone, or interact with it, to regulate many aspects in plant growth such as root development.
Zienab Ahmed won an ISHS student award for the best oral presentation at the IX International Symposium on In Vitro Culture and Horticultural Breeding in Egypt in March 2016.
Contact: Assist. Prof. Zienab Ahmed, South Valley University Agriculture Collage Horticulture Department 83523 Qena, Egypt. email: firstname.lastname@example.org
The full article is available in Chronica Horticulturae