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第十章 植物的逆境生理 PowerPoint PPT Presentation


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第十章 植物的逆境生理. 本章重点和难点:. 一、逆境的概念; 二、植物的抗寒性、抗旱性的机理与农业。. 本 章 内 容. 第一节 植物抗逆的生理基础 第二节 植物的抗寒性 第三节 植物的抗热性 第四节 植物的抗旱性 第五节 植物的抗涝性 第六节 植物的抗盐性 第七节 抗病性与抗虫性. 第一节 植物抗逆的生理基础. 一、逆境的概念及种类 逆境 (stress): 是指对植物生存生长不利的各种环境因素的总称。 逆境种类. 生物因素. 病害、虫害、杂草. 物理的 辐射性的 化学的 温度的 水分的. 理化因素. 逆境对植物的伤害 :

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第十章 植物的逆境生理

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3776039


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(stress):


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  • :

    , ,

    ,

    ,

    ,


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1(hardiness)

2

(stress avoidance)

(stress tolerance)


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()


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()

1

  • .


2 stress proteins

2stress proteins

  • heat shock proteincold responsive proteincold shock protein

  • pathogenesis-related proteinPR

  • salt-stress protein

  • protein isoformanaerobic proteinosmotin(anaeribuc polypeptide)\UV-induced proteindrought stress proteinchemical-induced protein


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3

  • O2- 1O2OHRO(H2O2)

  • SODCATPOD()


4 osmoregulation osmotic adjustment

4osmoregulationosmotic adjustment

  • (osmoregulation)

  • ,

  • pH

    prolinebetaines


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5

ABA

ABA

ABA


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(0)


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2

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4

5


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()

1.

2.

3.

4.

()

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(0)


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1.

2.

(-SH)

21


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  • 1962Levitt-SH-S-S--S-S-


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1 ()

2

CTKABA

3

NPK


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heat injury

heat resistance

1020152021030353 301004565100

1.

2.


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(HSP):,,.

HSP15000~104000.,,.

HSP(molecular chapterone),;,,.

HSF(),HSPmRNA,,HSP,HSPHSP,DNA(HSE),HSPmRNA,HSP.


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1.


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2.

1

NH3

ATP

2


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()MgZn


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1.;

2.;

3.


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1.

2.

3.

1.wiltingtemporary wiltingpermanent wilting

2.


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1.

2.

3.

4.

DNARNA

5.ABACTK

CTK/ABA

6.

7.


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1.

  • 2.


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1.

2 .PKBCu

3.CaCl2ZuSO4

4.

ABACCC();

5.


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1.waterlogging

2.flood injury


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1

2


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PH


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salt injury

salt resistance

salt avoidance

salt tolerance


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  • 1%

  • Na2CO3NaHCO3alkaline soil

  • NaClNa2SO4saline soil

  • saline and alkaline soil


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1.

2.

3.


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1

2


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()


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1

2

3ABA


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4

5

6

7

8

9

10

11

12


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Thank you!


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