NITROGEN RELATIONS OF THE SORGHUM STRIGA-HERMONTHICA HOST-PARASITE ASSOCIATION - GERMINATION, ATTACHMENT AND EARLY GROWTH
NITROGEN RELATIONS OF THE SORGHUM STRIGA-HERMONTHICA HOST-PARASITE ASSOCIATION - GERMINATION, ATTACHMENT AND EARLY GROWTH
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DOI：
10.1111/j.1469-8137.1993.tb03858.x
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发表时间：
1993-08-01
期刊：
影响因子：
9.4
通讯作者：
PRESS, MC
中科院分区：
文献类型：
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作者：
CECHIN, I;PRESS, MC
寄生被子植物Striga hermonthica与高粱寄主成功结合的可能性部分取决于生长培养基中硝酸铵的浓度。1 mm硝酸铵处理的发芽率高于3 mm硝酸铵处理。硝酸铵既不影响寄主根系分泌物活性成分的稳定性，也不影响寄主种子对活性成分的感知。高浓度的硝酸铵并没有显著减少高粱根部钾离子的渗漏（尽管不同化合物的渗漏模式可能不同）。因此，硝酸铵似乎既减少了刺激性化合物的产生，也减少了它们从寄主根部的特定泄漏。在较高的硝酸铵浓度下，寄生根随后的附着和植物的早期生长也较低，并讨论了这些观察结果的可能原因。
The probability of the parasitic angiosperm Striga hermonthica achieving a successful union with its sorghum host is in part dependent on the concentration of ammonium nitrate in the growth medium. Germination rates were higher with 1 mm than with 3 mm ammonium nitrate. Ammonium nitrate did not influence either the stability of active components of host root exudate, or their perception by the parasite's seed. High concentrations of ammonium nitrate did not significantly reduce the leakage of potassium ions from sorghum roots (although patterns of exudation may differ between groups of compounds). Thus, it appears that ammonium nitrate reduced either the production of stimulatory compounds, or their specific leakage from host roots. Subsequent attachment of the parasite radicle and early growth of the plant were also lower at higher concentration of ammonium nitrate, and possible reasons for these observations are discussed.