Mir Rayees Ahmad, Argal Surendra, Ahanger Mohammad Abass, Singh R P, Agarwal R M
School of Studies in Botany, Jiwaji University, Gwalior, 474011, India.
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna Dai Autonomous Prefecture, China.
Sci Rep. 2025 Aug 27;15(1):31654. doi: 10.1038/s41598-025-94721-8.
Laboratory and pot experiments were conducted to evaluate the influence of leachates of fresh/dry parts of marigold on photosynthetic pigments and nitrogen metabolism of wheat. Considerable decline in chlorophylls and carotenoids and the activities of enzymes of nitrogen metabolism (nitrate reductase, alanine and aspartate aminotransferases, glutamate dehydrogenase and glutamate synthase) was noticed in plants treated with higher concentration of fresh (30% w/v) or dry (10% w/v) leaf and flower leachates of marigold. However, treatment of lower concentrations i.e., 5% (w/v) of leachates of fresh parts and 1% (w/v) leachates of dry parts imparted stimulatory effects. Sodium and potassium contents in different parts of wheat plants showed a significant increase with the increase in the concentration of dry leachates both at pre-flowering and flowering stages. On the other hand, nitrogen and calcium content exhibited a decline with the increase in concentration of leachates. The study indicates that identification of allelochemicals in these leachates may probably help evaluation of marigold as a natural herbicide for sustainable agriculture paving way for further study.
开展了实验室和盆栽试验，以评估万寿菊鲜叶/干叶浸出液对小麦光合色素和氮代谢的影响。在用较高浓度的万寿菊鲜叶（30% w/v）或干叶（10% w/v）及花浸出液处理的植株中，叶绿素、类胡萝卜素以及氮代谢相关酶（硝酸还原酶、丙氨酸和天冬氨酸转氨酶、谷氨酸脱氢酶和谷氨酸合酶）的活性显著下降。然而，较低浓度处理，即鲜叶浸出液5%（w/v）和干叶浸出液1%（w/v）则具有刺激作用。在小麦植株的开花前期和开花期，随着干浸出液浓度的增加，小麦植株不同部位的钠和钾含量显著增加。另一方面，氮和钙含量则随着浸出液浓度的增加而下降。该研究表明，鉴定这些浸出液中的化感物质可能有助于评估万寿菊作为可持续农业的天然除草剂，为进一步研究铺平道路。
