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植物不同组织部位的植硅体形态、组合研究有助于准确鉴定考古地层植硅体来源植物的具体种类以及组织部位;生长周期内植硅体形态、组合变化研究有利于探讨植硅体的形成机制,认识植硅体形态组合变化与环境因子之间的关系,科学解释土壤及沉积物植硅体古植被、古环境信息。玉米变种亚航0919在生长的初期,尤其是前3片真叶,含比重较高的3片以上的多铃型植硅体;随着玉米生长天数增加及生长温度的升高,第4—5片真叶3片以上多铃型植硅体消失,哑铃型植硅体含量逐渐增加,尖型及棒型植硅体含量有所降低,叶片哑铃型植硅体长度(L)及宽度(W)有增加的趋势;相同生长阶段,叶片与叶脉植硅体组合及大小显著不同,叶脉相对叶片含较低比重的哑铃型植硅体、较高比重的十字型和椭圆-哑铃型植硅体,叶脉中哑铃型植硅体小于叶片中的。玉米叶片植硅体形态、组合在生长季节内的变化主要与植物的成熟阶段及生长环境温度的变化有关,其植硅体形态、大小和组合,尤其是哑铃型植硅体大小能够响应温度变化。
The phytolith morphology and assemblage in different tissues of plants can help to accurately identify the specific species and tissues of phytolith-derived plants in archeological formations. The study on the changes of the morphology and composition of phytoliths during the growth cycle is helpful for the study of phytolith formation Mechanism, recognize the relationship between the changes of phytolith assemblages and environmental factors, and scientifically explain the ancient vegetation and paleoenvironmental information of phytoliths in soils and sediments. Corn Varieties AirAsia 0919 in the early growth, especially the first three true leaves, with a higher proportion of more than 3 polysellar type phyllosum; with the number of maize growing days and the growth temperature increases, the first 4-5 More than 3 pieces of polychromic phyllosilicates disappeared, and content of dumbbell-shaped phyllosilicate increased gradually. The contents of apical and rod-shaped phylums decreased. The length and width of dumbbell- ) Had the trend of increasing. In the same growth stage, the combination and size of the phyllosum were significantly different between leaves and veins, and the relative leaves of the veins had a lower proportion of dumbbell-shaped phyllosum, the higher proportion of cross-shaped and oval-dumbbell-shaped phyllosilicate The dumbbell-shaped phyllosum in the veins is smaller than that in the leaves. The variation of the morphology and composition of the phytolith in maize leaf during the growing season is mainly related to the maturation stage of the plant and the change of the growth environment temperature. The morphology, size and combination of the phytoliths, especially the size of the dumbbell-shaped phytolith, can respond to temperature changes .