Noor Ul Amin1, Abdur Rauf1*, Amjad Iqbal2, Muhammad Qayash3, Farooq Jan1, Ikramullah Khan1, Muhammad Sadiq1, Muhammad Faiq1, Mamoona Bibi1, Muhammad Wisal1, Kashmala Jabbar4, Yumeng Liu5 and Wang Xiaoyu6
1Garden Campus, Department of Botany, Abdul Wali Khan University, Mardan, Pakistan 2Garden Campus Department of Agriculture, Abdul Wali Khan University, Mardan, Pakistan 3Garden Campus Department of Zoology, Abdul Wali Khan University, Mardan, Pakistan 4GPGGC, Mardan, Pakistan 5Huazhong Agricultural University, China 6Yunnan Agricultural University, China
*Corresponding author: rauf77@awkum.edu.pk
Helianthus annus L. is a powerful allelopathic plant and contains significant allelochemicals with well-known allelopathic potential against plants. In this research work, the extracts were collected in freshwater, methanolic and desiccated air from seeds and roots. The seedlings of wheat (Triticum aestivum L.) and lettuce (Lactuca sativa) were treated with those extracts. Our results showed that extracts from the seed and root pose a major effect on the germination of seed, development & arid biomass of wheat and lettuce seedlings. Moreover, the seed extract of H. annus affected growth parameters of T. aestivum and L. sativa than that of root exudates. Similarly, the methanolic extracts of seeds and roots have remarkably reduced root growth in T. aestivum and L. sativa seedlings. From the data, it is speculated that the allelochemicals of sunflower repressed the wheat and lettuce seedlings' growth, which might have resulted from various cellular processes responsible for reduced plant growth.