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Volume 8, Issue 1 (Suppl)
J Cell Sci Ther
ISSN: 2157-7013 JCEST, an open access journal
Stem Cell Research 2017
March 20-22, 2017
March 20-22, 2017 Orlando, USA
8
th
World Congress and Expo on
Cell & Stem Cell Research
Alfatih A A Aboagla et al., J Cell Sci Ther 2017, 8:1 (Suppl)
http://dx.doi.org/10.4172/2157-7013.C1.039LysophosphatidicAcidAcyltransferase2 (LPAT2) enhances abscisic acid response and plays a positive role
in osmotic stress in rice
Alfatih A A Aboagla
and
Hong Yueyun
Huazhong Agricultural University, China
L
ysophosphatidyl acyltransferase (LPAT) is a pivotal enzyme controlling the metabolic flow of lysophosphatidic acid into different
phosphatidic acids in diverse tissues. Recent results begin to shed light onto the involvement of
LPAT2
in response to ABA, water
deficits, and salinity. We examined and characterized putative
LPAT2
gene in rice (
Oryza sativa
).
LPAT2
transcript is existing in all
tissues tested with relatively higher in leaves and roots, and was induced by salt, drought and ABA treatment, suggesting its roles in
plant growth and stress response. Moreover,
LPAT2
is localized to the endoplasmic reticulum (ER) membrane, implicati-ng its role
in lipid metabolism and signaling. Additionally,
LPAT2
might be essential for gametophyte or embryo development as homozygous
mutant for a T-DNA insertion in
LPAT2
coding region fails to recover in rice. Using a knockdown mutant
lpat2
and its genetic
complementation revealed that
LPAT2
is important for plants to adapt osmotic stress. Reduced
LPAT2
conferred plants and seeds
were more sensitive to ABA treatment and were less tolerant to salt and drought stress. The results suggest that
LPAT2
plays a positive
role in ABA response and osmotic stress tolerance. The role of
LPAT2
in osmotic stress is mediated by ABA response as shown that
the
lpat2
mutant exhibited more water loss from leaves when supplied ABA under salt stress. The ABA responsive gene RAB18 was
less induced by ABA and salt treatments in the
lpat2
mutant. The result suggests that
LPAT2
enhance ABA response to promote plants
osmotic stress tolerance. PA produced by
LPAT2
activity might be also important for ABA response. PA supplementation is capable
of restoring ABA sensing and salt stress tolerance as WT performance. The effects of
LPAT2
on plant stress tolerance might be dual
effects of PA, enhanced ABA response and enhanced growth. Our study reveals novel interactions among ABA,
LPAT2
and PA and
provides insight into progresses in agronomic traits and adaptive growth through the manipulation of these pathways in rice.
Biography
AlfatihAAAboagla has completed his MSc fromHuazhongAgricultural University, Wuhan, P. R. China. Currently, he is doing his PhD in Microbiology (Bioengineering).
2725873001@qq.com