STRIGA HERMONTHICA SEED GERMINATION THROUGH ROOT EXUDATES OF INDIGENOUS SUB-SAHARAN WEED SPECIES

AGRIVITA, Journal of Agricultural Science

Somporn na Nakorn¹  Randy Trinity Nijkamp¹ 

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关键词: diazotroph;    IAA;    N fixation;    nitrogenase;    plant growth;   

DOI  :  10.17503/agrivita.v34i3.185

学科分类：农业科学（综合）

来源: Universitas Brawijaya * Fakultas Pertanian / Brawijaya University, Faculty of Agriculture

【 摘 要 】

Normal 0 false false false EN-US X-NONE X-NONE This study was conducted to evaluate root exudates from sub-Saharan indigenous weed species to induce germination of Strigahermonthica (Del.) Beth., a root parasitic weed.Significant variation in Striga seed germination was observed, ranging from an absence to the induction of 74.1% Striga seeds. Direct comparison of Striga germination was obscured by differences in weed root biomass as within most of the species, a direct proportional relation between Striga seed germination and weed root dry weight was observed. Expression of Striga seed germination in % g -1 root dry weight (GIC) was found a suitable solution, as stable values for GIC were obtained, despite considerable variation in root dry weight. GIC was significant for 25 species and highest with Commelinaforskalaei and Sesamumalatum (9.91; 9.78 % g -1 dry root, respectively). Striga seeds did not germinate following application of exudates from Mitracarpusscaber and Phyllanthuspentrandus . These results show that a substantial number of indigenous weed species may serve as alternative trap crops to control the parasites seed bank. Furthermore, the timing of weeds in the cropping system may provide a (partial) explanation for the erratic infestation levels found across fields and years that has dazedresearchers for many years. Keywords: Strigahermonthica, seed germination, indigenous weeds, root exudates, seed bank

【 授权许可】

Unknown