Changes inArabidopsisLeaf Ultrastructure, Chlorophyll and Carbohydrate Content During Spaceflight Depend on Ventilation
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چکیده
منابع مشابه
Effects of Polyamines on Chlorophyll and Protein Content, Photochemical Activity, and Chloroplast Ultrastructure of Barley Leaf Discs during Senescence.
The polyamines putrescine, spermidine, and spermine prevent the loss of chlorophyll normally associated with senescence of excised leaf tissue maintained in darkness on water (control). Retention of chlorophyll in barley leaf discs was in the range of 90% 4 days after excision and placement on effective polyamine solutions. In contrast, the loss of soluble protein was hastened with 0.5 millimol...
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INTRODUCTION Exposure to microgravity causes irregularities in posture, locomotion and oculomotor function. The vestibular abnormalities experienced by astronauts entail immediate reflex motor responses, including postural illusions, sensations of rotation, nystagmus, dizziness and vertigo. Behavioral adaptation to the microgravity environment usually occurs within one week. Although the mechan...
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The contraction of the entire thrombocyte appears to be a primary factor in the retracting mechanism of dogfish (Musteltis canis) in vitro blood clots. Microtubules probably account for the condensation and lobation of the nucleus, and the impetus for cytoplasmic contraction appears to be dependent upon the grouping of microfibres of dimensions difficult to measure. These microfibres show a str...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 1998
ISSN: 0305-7364
DOI: 10.1006/anbo.1998.0585