病程相关蛋白在烟草花中受到发育调控。
Pathogenesis-related proteins are developmentally regulated in tobacco flowers.
作者信息
Lotan T, Ori N, Fluhr R
机构信息
Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel.
出版信息
Plant Cell. 1989 Sep;1(9):881-7. doi: 10.1105/tpc.1.9.881.
Abstract
The accumulation of pathogenesis-related proteins (PR) in tobacco leaves has been casually related to pathogen and specific physiological stresses. The known enzymatic function of some of these proteins is potentially antimicrobial. By using antibodies specific to three classes of pathogenesis-related proteins, we examined tobacco plants during their normal growth. The pathogenesis-related proteins accumulated during the normal development of the tobacco flower. The PR-1 class of proteins (biological function unknown) is located in sepal tissue. PR-P, Q polypeptides are endochitinases and are present in pedicels, sepals, anthers, and ovaries. A glycoprotein serologically related to the PR-2,N,O class is a (1,3)-beta-glucanase and is present in pistils. Differential appearance during flower development, in situ localization, and post-translational processing of floral pathogenesis-related proteins point to a hitherto unsuspected function these classes of pathogenesis-related proteins play in the normal process of flowering and reproductive physiology.
摘要
烟草叶片中病程相关蛋白（PR）的积累与病原体和特定生理胁迫有一定关联。这些蛋白中一些已知的酶功能可能具有抗菌性。通过使用针对三类病程相关蛋白的特异性抗体，我们在烟草植株正常生长期间对其进行了检测。病程相关蛋白在烟草花的正常发育过程中积累。PR-1类蛋白（生物学功能未知）位于萼片组织中。PR-P、Q多肽是内切几丁质酶，存在于花梗、萼片、花药和子房。一种与PR-2、N、O类血清学相关的糖蛋白是（1,3）-β-葡聚糖酶，存在于雌蕊中。花发育过程中的差异出现、原位定位以及花病程相关蛋白的翻译后加工表明，这些类别的病程相关蛋白在开花和生殖生理的正常过程中发挥着迄今未被怀疑的功能。
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