Kordyum E, Adamchuk N
Institute of Botany, National Academy of Sciences of Ukraine, Kiev.
J Gravit Physiol. 1997 Jul;4(2):P77-8.
Photosynthesis is known to provide nearly all the carbon and chemical energy needed for plant growth, it depends on many environmental factors and alternates when these factors fluctuate. The degree of the chloroplast membrane system development can be, to a certain extent, an indicator of the organelles' photosynthetic activity. To-date, changes in chloroplast size and ultrastructure as well as starch and pigment content in leaf mesophyll cells in microgravity have been found in variety of the angiosperm species investigated in this respect. However, available data are very limited and contradictory. Taking into account the importance of studying the photosynthesis process to elucidate the possibilities of plant physiological adaptation in altered gravity that is the basis for working out the technologies of space planting in controlled ecological life-support systems, we conducted the investigations of ultrastructure and state of the photosynthetic apparatus in Arabidopsis thaliana leaf mesophyll cells at the different stages of plant development under clinorotation.
众所周知，光合作用为植物生长提供了几乎所有所需的碳和化学能，它取决于许多环境因素，并在这些因素波动时发生变化。叶绿体膜系统的发育程度在一定程度上可以作为细胞器光合活性的指标。迄今为止，在这方面研究的多种被子植物中，已发现微重力下叶肉细胞中叶绿体大小和超微结构以及淀粉和色素含量的变化。然而，现有数据非常有限且相互矛盾。考虑到研究光合作用过程对于阐明植物在改变重力条件下生理适应可能性的重要性，而这是制定受控生态生命支持系统中太空种植技术的基础，我们对拟南芥叶肉细胞在回转器作用下植物发育不同阶段的光合装置超微结构和状态进行了研究。
