[Nitric oxide production in Malus hupehensis roots under waterlogging and the effects of exogenous NaNO3 on this production].
Taking two-year old Malus hupehensis as test material, this paper studied its root nitric oxide (NO) production under waterlogging, and the effects of exogenous NaNO3 on this production. Waterlogging for 3-9 days promoted the NO production significantly. Within the 12 days of waterlogging, the NO production, nitrite reductase (NR) and nitric oxide synthase (NOS) activities, and malondialchehyche (MDA) content in roots increased first, and decreased subsequently. Under waterlogging, the application of 10 mmol NaNO3 x L(-1) inhibited the increase of MDA content and NOS activity while improved the NR activity significantly. After applying NaNO3, the root NO production increased in the first three days, but decreased significantly after the 6th day.
Sui
Jing
J
College of Horticulture Science and Engineering, Taian 271018, Shandong, China. suijjjj@163.com
Yang
Hong-Qiang
HQ
Zhang
Xin-Rong
XR
Jiang
Qian-Qian
QQ
Ran
Kun
K
Sun
Xiao-Li
XL
Li
Qiang
Q
D017753:Ecosystem; D055868:Floods; D027845:Malus / Q000187:drug effects / Q000378:metabolism*; D009566:Nitrates / Q000494:pharmacology*; D009569:Nitric Oxide / Q000096:biosynthesis*; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism*
D009566:Nitrates; D009569:Nitric Oxide; C031618:sodium nitrate