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首页> 外文期刊>Plant biology >Infection with Phloem Limited Abutilon Mosaic Virus Causes Localized Carbohydrate Accumulation in Leaves of Abutilon striatum: Relationships to Symptom Development and Effects on Chlorophyll Fluorescence Quenching During Photosynthetic Induction
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Infection with Phloem Limited Abutilon Mosaic Virus Causes Localized Carbohydrate Accumulation in Leaves of Abutilon striatum: Relationships to Symptom Development and Effects on Chlorophyll Fluorescence Quenching During Photosynthetic Induction

机译：韧皮部有限的util麻花叶病毒感染导致of麻纹状体叶片中局部碳水化合物的积累：与症状发展的关系以及对光合诱导过程中叶绿素荧光猝灭的影响

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Infection with phloem limited Abutilon Mosaic Virus caused localized carbohydrate accumulation (high levels of starch, sucrose, and hexoses) in leaves of Abutilon striatum during early symptom development. In mature leaves with attenuated symptoms, tissues showing faint vein-clearing had markedly higher carbohydrate contents than uniformly green areas of the same leaf. A similar pattern of carbohydrate accumulation was found in pale-green mosaics in mature leaves with overt symptoms when compared to green-islands of the same leaf, but overnight carbohydrate loses were comparable to controls. Because leaves with attenuated symptoms showed no further symptom development whereas the pale-green mosaics became yellow and eventually necrotic in leaves with overt symptoms, it seems unlikely that carbohydrate accumulation following impaired translocation was responsible for symptom expression. High carbohydrate status in leaves with attenuated symptoms had little effect on nonphotochemical quenching during early stages of photosynthetic induction. In leaves with overt symptoms, areas of high carbohydrate status with pale-green mosaics showed markedly slower nonphotochemical quenching. Early symptom areas of young leaves, and advanced symptom areas of mature leaves had low starch contents but were otherwise similar to controls in carbohydrate status. Impaired nonphotochemical quenching in these tissues tended to reflect the state of symptom development,rather than carbohydrate status. Plants with overt symptoms grew about half as fast as plants with attenuated symptoms.
机译：韧皮部有限的Ab麻花叶病毒感染导致症状早期发展期间Ab麻纹状体叶片中的局部碳水化合物积累（高水平的淀粉，蔗糖和己糖）。在症状减弱的成熟叶片中，显示出淡淡的静脉清除作用的组织的碳水化合物含量明显高于同一叶片的均匀绿色区域。与同一片叶子的绿色岛相比，在成熟叶子的淡绿色马赛克中发现了类似的碳水化合物积累模式，具有明显的症状，但是过夜的碳水化合物损失与对照组相当。因为症状减轻的叶片没有进一步的症状发展，而淡绿色的花叶变成黄色，最终在具有明显症状的叶片中坏死，所以似乎不太可能由易位后的碳水化合物积累引起症状表达。在减缓症状的叶片中，高碳水化合物状态对光合作用初期的非光化学猝灭影响很小。在有明显症状的叶片中，碳水化合物含量高的区域带有浅绿色的马赛克，显示出非光化学猝灭的速度明显减慢。幼叶的早期症状区和成熟叶的高级症状区的淀粉含量低，但与碳水化合物状态的对照相似。在这些组织中受损的非光化学猝灭趋向于反映症状发展的状态，而不是碳水化合物的状态。具有明显症状的植物的生长速度比具有减弱症状的植物的生长速度快一半。

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