1. Rather Waxy Wheat To Drought Stress Physiological Response Mechanism

The materials are the new species NingNuo wheat 1 that provides by Agricultural Science institute, JiangSu Province, big area generalize wheat Zheng wheat 5 and Ning wheat 14, studied drought stress on each ensign leag of different growth time only match the change law of characteristic and physiology bio-chemical function.With expect initial disclosure the water stress vs each anti corresponding period wheat blade on the theory horizontal of impact, providing theoretically on the NingNuo wheat 1 growing at the same time basis.Main search result as follows:1.Coerce in the PEG6000(gather glycol) progress simulation drought stress, rather the NingNuo wheat 1 young sprout blade contra includes amount of water and chlorophyll contents to all present to descend trend, the chlorophyll fluorescence parameter Fo scale - up, Fv/Fm and PI(abs) step-down, its conductance rate presents up-trend. Super-the oxide Qi descend after turning the Mao(SOD), CAT present with POD activity to up first, MDA contents then present up-trend, but O2- the contents ups first, then descends end again up.The change anti that the vane green body structure takes place is obvious, mainly is love osmium drop to obviously increase.Is dry to cause film fat super - oxadation damages, cause blade of vane the green body structure encounter puncture and love osmium drop to obviously increase inside the vane green body.For the O2 then appear with three kinds of safeguard Maos.2.In the drought stress, rather NingNuo wheat 1, Zheng wheat 5 and Ning whaeat 14 anti corresponding period blade the contra include amount of water, the conductance leads and the chlorophyll contents compares collates all descend;C two Quan contentses and super-oxidizing anion generate speed compare collate scale-up;Three kinds of anti-oxidations enzyme activity and the ionize Pro and dissolubility sugar contents all heat up.Can discover from this experiment, in the drought stress, each time blade the contra include amount of water step-down, chlorophyll contents droop, the conductance lead and the MDA contents heat up and cause film fat super-the oxadation turn worse, the anti - oxidation protects a enzyme activity scale-up and osmosis conditioning matter scale-up, there is the action of safeguard. And three kinds of wheats at take out the flower to expect contra to include the super-oxadation contra of amount of water and film fat is all larger than the other time change amplitude at the collate, explain to expect vs the moisture and coerce most sensitive, three kinds of safeguard enzyme and osmosis at this time.According to the results, Zheng wheat 5 includes amount of water, chlorophyll contents and film fat lead oxadation scale-up amplitude's minimum, Ning wheat 14 time it, end rather NingNuo wheat 1, study a result enunciation, anti-drought strong or weak difference for: Zheng wheat 5> Ning wheat 14> NingNuo wheat 1.3.Under water stress, CaCl2 pais rather NingNuo wheat 1 and Ning wheat 14 flower expect the impact of the chlorophyll fluorescence parameter and photosynthesis.Express as a result:Is dry to coerce the chlorophyll fluorescence parameter Fo scale-up, Fv and Fv/Fm of the wheat step-down. Tr,Pn, Gs,Ci are get down on the water stress. Vane's surface sprays 10 mmols·L-1 CaC2, two kinds of Fo of wheats more dry stress to have droop, Fv, Fv/Fm and Pn and Tr, Gs and Ci more water stress to all have scale-up, explain CaCl2 pais droughtses to stress to obviously alleviate an action.Is dry stress pais rather effect on the NingNuo wheat 1 larger, rather the wheat No.14 time it.The effect of repair in 10 mmol-L-1 CaCl2is obviously.