Autointoxication in root exudates ofAsparagus officinalis L.
Autointoxication in root exudates ofAsparagus officinalis L.
复制标题
芦笋根分泌物的自中毒。
DOI：
10.1007/bf02220251
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发表时间：
1984
期刊：
影响因子：
4.9
通讯作者：
C. Young
中科院分区：
文献类型：
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作者：
C. Young
在蛭石培养条件下，研究了芦笋根系分泌物对同一种属幼苗生长和养分吸收的影响。采用芦笋种子生物测定法对采集的芦笋根分泌物进行了植物毒性测定。根分泌物从供体罐冲洗到受体罐。三个品种芦笋苗的茎高和茎数。Mary Washington、California 309和711植株根系分泌物显著减少。3个品种的幼苗生长无显著差异。根系分泌物处理对芦笋幼苗顶部氮、磷、钾含量影响不大。树脂诱捕系统收集的芦笋根系分泌物抑制了芦笋根和芽的生长。用根渗出液获得的生物测定结果表明，根渗出液对芽生长的抑制大于对根生长的抑制，这与蛭石培养的结果相对应。这些数据表明，芦笋是一种根系分泌物抑制自身生长的自抑制物种。讨论了自中毒作为热带地区芦笋复种中产量下降和植株缺失的可能机制。
Effects of asparagus root exudates on the growth and nutrient uptake of the seedlings of the same species in vermiculite culture were investigated. The phytotoxicity of collected root exudates of asparagus was tested by asparagus seed bioassay. Root exudates were washed from the donor pot to the acceptor pot. The height and number of stalks of asparagus seedlings of three varieties. Mary Washington, California 309 and 711 receiving root exudates were significantly reduced. No significant difference was observed in the growth of seedlings among these three varieties. N, P and K contents in the tops of asparagus seedlings were unaffected by root exudate treatments. The growth of asparagus radicle and shoot was inhibited by the root exudates collected from a resin trapping system. Bioassay results obtained with root exudates where the inhibition of shoot growth by root exudate was greater than that of root growth corresponded to the result in vermiculite culture. These data suggested that asparagus is an autoinhibited species which root exudates inhibit its own growth. Autointoxication as a possible mechanism for the yield decline and missing of plants in the replanting of asparagus in the tropics is discussed.