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Abscisic acid : a seed maturation and antistress signal :

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Abscisic acid : a seed maturation and antistress signal :

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    1. Abscisic acid : a seed maturation and antistress signal ???:??????????

    2. ABA???? ABA?15?????,???????????????? ABA????????,??????????

    3. ABA??? ??????? Gas chromatography (GC) High performance liquid chromatography (HPLC)

    4. Biosynthesis, Metabolism, and Transport of ABA

    5. ABA??????????????????? ?Isopentenyl diphosphate (IPP) ???????(Fig. 23.2) ABA???????????????,????Vivipary ABA ???????????????

    6. ABA????????????? ??????????????100?,??????? ???,4-8??????50???????,?????????? ABA????????????ABA???????,???????ABA????????????????????????ABA????

    7. ABA???????????????

    8. ABA??????? ABA?????,???????????,?????????????,??????????? ABA?????????????????

    9. Developmental and physiological effects of ABA

    10. ???????ABA??

    11. ABA???????? ??????????????????? ??ABA????????????? ?????mRNA????Late embryogenesis abundant (LEA),???????????

    12. ABA???????????????

    13. ???????????? Coat-imposed dormancy Prevention of water uptake Mechanical constraint Interference with gas exchange Retention of inhibitors Inhibitor production Embryo dormancy Primary dormancy Secondary dormancy

    14. ?????????? photodormancy – seed germination depends on light or dark conditions. ex.lettuce. short periods of chilling stratification- ex. pawpaw after-ripening- ex. hardwickii cucumber.

    15. ABA?GA???????? GA-deficient mutant????GA?????? Revertants ????????? ???????ABA????,??ABA?GA?????????

    16. ABA?????? ?????????????????? ABA??????????,??????,?????? ?????????????ABA,????????cytokinins?GAs????

    17. ABA??GA??????? ABA????????????????? ?GA?????????a-amylase,ABA??a-amylase mRNA??????

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