Changes in the metabolism of wheat leaves induced by infection with powdery mildew
Changes in the metabolism of wheat leaves induced by infection with powdery mildew
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DOI：
10.2307/2437306
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发表时间：
1942-06-01
影响因子：
3
通讯作者：
Allen, PJ
中科院分区：
文献类型：
--
作者：
Allen, PJ
这些变化是由小麦白粉病菌侵染后叶片的生理生化变化引起的。氚分2个阶段。在第1，呼吸重接种叶片从0.2上升到1毫米。鲜重/小时，并主要代表葡萄糖的氧化（如R所示）。Q.接近1，呼吸和葡萄糖含量之间平行）。葡萄糖含量从鲜重的0.2%增加到0.8%;蔗糖0.3 - 1.3%;淀粉0 - 0.2%。上述所有的最大值都在同一天达到。叶绿素从约。3.0 X 10 - 9至1.2 X 10 - 9摩尔/mg。鲜重;光合作用从22毫米减少到3或4毫米。在轻度接种的叶（20 - 100个菌落/cm 2）中，这些变化需要更长的时间，并且在呼吸曲线中有2个峰，对应于初级和次级菌落的发育。大部分的霉菌生长都是在这个时期。在2d阶段，即叶片死亡结束时，呼吸作用、葡萄糖、蔗糖和淀粉迅速下降到低水平或消失;叶绿素可能继续下降或可能略有增加;光合作用继续下降，但速度更慢;几乎没有进一步的霉菌生长。霉菌菌落下出现的绿色岛屿代表叶绿素在最初被破坏的区域重新形成。
These changes in leaves infected with Erysiphe graminis var. tritid are divided into 2 phases. In the 1st, the respiration of heavily inoculated leaves rises from 0.2 to 1 mm.3 O2/mg. fresh wt./hr., and represents primarily an oxidation of glucose (as indicated by an R. Q. close to 1 and a parallelism between respiration and glucose content). Glucose content increases from 0.2 to 0.8% of the fresh wt.; sucrose from 0.3 to 1.3%; starch from 0 to 0.2%. The maximum in all of the above is reached on the same day. Chlorophyll decreases from approx. 3.0 X 10-9 to 1.2 X10-9 moles/mg. fresh wt.; photosynthesis from 22 to 3 or 4 mm.3 CO2 reduced/mg./hr. In lightly inoculated leaves (20-100 colonies/cm.2) these changes take longer, and there are 2 peaks in the respiratory curve corresponding to the development of primary and secondary colonies. Most of the mildew development is during this period. In the 2d phase, which terminates with death of the leaves, respiration, glucose, sucrose, and starch decrease rapidly to a low level or disappear; chlorophyll may continue to decrease or may increase slightly; photosynthesis continues to decline, but more slowly; and there is little further mildew growth. The appearance of green islands beneath mildew colonies represents a re-formation of chlorophyll in areas where it was first destroyed.