FU Xuepeng,ZHANG Huan,GONG Siyu,et al.Effects of Different Nutritional Deficiency and Indolebutyric Acid on Roots Growth of Potato Onion[J].Northern Horticulture,2019,43(18):1-9.[doi:10.11937/bfyy.20183563]
不同矿质营养缺乏及吲哚丁酸对分蘖洋葱根系生长的影响
- Title:
- Effects of Different Nutritional Deficiency and Indolebutyric Acid on Roots Growth of Potato Onion
- Keywords:
- potato onion; nutritional deficiency; root growth; indolebutyric acid; split-root culture; nutritional heterogeneity
- 文献标志码:
- A
- 摘要:
- 以分蘖洋葱为试材，采用营养液水培法和分根培养法研究氮（N）、磷（P）、钾（K）、钙（Ca）、镁（Mg）、铁（Fe）6种矿质营养缺乏以及吲哚丁酸对分蘖洋葱根系生长的影响，以期为分蘖洋葱合理施肥及植物根系发育理论提供科学依据。结果表明：缺N、K、Ca处理中分蘖洋葱根系的长度显著低于全营养处理，缺P则对根系伸长影响不大；缺Mg和缺Fe则促进根系伸长。缺N和缺K处理中根条数显著少于全营养处理，其它几种元素对根条数无显著影响。缺N、缺P、缺Ca、缺Mg和缺Fe处理中侧根数显著多于全营养处理，其中缺N处理中的侧根数要远大于全营养处理和其它缺素处理，而缺K处理中侧根数则为零。吲哚丁酸浓度为10 mg?L-1和15 mg?L-1时，分蘖洋葱根系长度显著高于0 mg?L-1，且浓度越大，根长越长。分根培养显示缺P侧的分蘖洋葱侧根数显著多于全营养处理的侧根数,说明分蘖洋葱根系对P的异质性响应主要是局部性的。
- Abstract:
- Potato onion (Allium cepa var.agrogatum Don.) was used as raw material to determine the effects of six mineral nutrition deficiencies (N，P，K，Ca，Mg，Fe) and indolebutyric acid on roots growth of the potato onion by hydroponic culture and split-root method，in order to provide scientific basis for rational fertilization on potato onion and plant root development theory.The results showed that the roots length of potato onion in N，K，Ca deficiency treatment were significantly lower than those in the total nutrition，P deficiency had little effect on root elongation，however，Mg and Fe deficiency promoted root elongation.Furthermore，the number of roots were significantly less in the N and K deficiency treatment than that in the total nutrition，however，other elements had no significant effects on roots number.The number of lateral roots in N，P，Ca，Mg and Fe deficiency treatment were significantly higher than those in the total nutrition，respectively.The number of lateral roots in N deficiency treatment was much higher than that in the total nutrition and other elements deficiency treatment，while the number of lateral roots in K deficiency treatment was zero.When the concentration of indolebutyric acid was 10 mg?L-1 and 15 mg?L-1，the roots length of potato onion were significantly longer than that of 0 mg?L-1，and the higher the concentration，the longer the root length.Split-root trial showed that the lateral root number of potato onion in P deficiency solution was significantly more than that in the total nutrition，indicating the response of potato onion roots to P heterogeneity was mainly localized.
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备注/Memo
第一作者简介：付学鹏（1979-），男，博士，讲师，研究方向为蔬菜作物逆境生物学和蔬菜作物耐/抗逆基因挖掘及育种。E-mail：409799196@qq.com.基金项目：黑龙江省自然科学基金资助项目(C2017068)；黑龙江省教育厅基本业务专项资助项目（135109254）；大学生创新创业资助项目（201910232068）。收稿日期：2019-04-11