Responses of hypocotyl elongation to light and sowing depth in peanut seedlings

文献类型： 外文期刊

第一作者： Xu, Hui-lian

作者： Xu, Hui-lian;Qin, Feifei;Takano, Tetsuo;Qin, Feifei;Lu, Dianqiu

作者机构：

关键词： AnM technique;anthocyanin;histological and anatomical observation;hypocotyl elongation;light;peanut (Arachis hypogaea);sowing depth

期刊名称：JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT （ 影响因子：0.435； 五年影响因子：0.484 ）

ISSN： 1459-0255

年卷期： 2012 年 10 卷 2 期

页码：

收录情况： SCI

摘要： Plant growth and health as well as the final shell yield is improved by the so-called AnM techniques including exposing the extra elongated hypocotyls to lift up the cotyledon node and induce xerophytophysiological regulations such as osmotic adjustment. Elongation of hypocotyls must be ensured by the dark conditions for germinating seeds in soil, which needs the seeds being. sown enough and properly deep. Therefore, in the present experiment, we examined the effects of light and seeding depth on elongation and morphology as well as anthocyan in accumulation of hypocotyls of peanut seedlings. A germinating hypocotyl of peanut stopped its elongation when the cotyledons met light even under the soil if the soil was cracked. Light strongly induced anthocyanin accumulation as observed in purple-red hypocotyls of peanut seedlings. The light effects of elongation inhibition, changes in tissue and cell morphology and anthocyan in accumulation in hypocotyls were stronger in cultivar 'Nakateyutaka' than in 'Chibahabtchi'. Although the photosynthetic functions were induced by light, the short hypocotyl and early development of the cotyledon node branches were not appreciated agronomically because, as described in our previous experiments, the early development of cotyledon node branches may make many problems for the later growth of the peanut crop. An extra elongated hypocotyl is also needed for the treatment of hypocotyl exposure to induce xerophytophysilogical regulations. In the present experiment, it was found that seeds should be sown deep enough, for example, up to 4 cm and 6 cm for cultivars 'Chibahabtchi' and 'Nakateyutaka', respectively.

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