Antifeedant activity of a novel 6-(4,7-hydroxy-heptyl) quinone^? from the leaves of the milkweed Pergularia daemia on the cotton bollworm Helicoverpa armigera (Hub.) and the tobacco armyworm Spodoptera litura (Fab.)     

Manickam Pavunraj  Chellaiah Muthu  Savarimuthu Ignacimuthu  Sundaram Janarthanan  Veeramuthu Duraipandiyan  Nagappan Raja  Selvaraj Vimalraj 《Phytoparasitica》2011,39(2):145-150

The effects of crude extracts and an isolated compound from the leaves of milkweed, Pergularia daemia (Forssk) Choiv., on the antifeedant activity against two important lepidopteran pests, Helicoverpa armigera (Hub.) and Spodoptera litura (F.), were studied. Maximum antifeedant activity was recorded in ethyl acetate crude extract against H. armigera (70.3%) and S. litura (71.82%) at 1% concentration. Ethyl acetate crude extract was further subjected to column chromatography, which was performed using hexane as initial solvent and then by increasing the polar strength using ethyl acetate. Fractions collected at hexane and ethyl acetate (80:20) yielded 6-(4,7-hydroxy-heptyl) quinone, a novel compound which showed significant antifeedant activity against H. armigera (80.22% at 2000 ppm) and S. litura (68.31% at 2000 ppm).  相似文献   

Bioefficacy of the triterpenoid friedelin against Helicoverpa armigera (Hub.) and Spodoptera litura (Fab.) (Lepidoptera: Noctuidae)     

Kathirvelu Baskar  Veeramuthu Duraipandiyan  Savarimuthu Ignacimuthu 《Pest management science》2014,70(12):1877-1883

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Using molecular markers to assess the genetic diversity and population structure of finger millet (Eleusine coracana (L.) Gaertn.) from various geographical regions     

M. Ramakrishnan  S. Antony Ceasar  V. Duraipandiyan  N. A. Al-Dhabi  S. Ignacimuthu 《Genetic Resources and Crop Evolution》2016,63(2):361-376

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Utilization of molecular markers for improving the phosphorus efficiency in crop plants          下载免费PDF全文

Theivanayagam Maharajan  Stanislaus Antony Ceasar  Thumadath Palayullaparambil Ajeesh krishna  Muthusamy Ramakrishnan  Veeramuthu Duraipandiyan  Al‐Dhabi Naif Abdulla  Savarimuthu Ignacimuthu 《Plant Breeding》2018,137(1):10-26

Phosphorus (P) is the second most growth limiting macronutrient after nitrogen and plays several important roles in all organisms including plants. In soil, P is available in both organic and inorganic forms. P deficiency reduces the growth and yield of several crop plants. Plants respond to P deficiency by the phenotypic changes especially by the modification of root architecture. Molecular marker‐assisted breeding (MAB) has been proposed as an important tool to identify and develop improved varieties of crop plants with efficient P‐use efficiency (PUE). Identification of quantitative trait loci (QTLs) for traits related to PUE has been considered as the first step in marker‐assisted selection (MAS) and improvement of crop yield programmes. In this review, we describe in detail on architectural changes of roots under P deficiency that are reported in various crops and discuss the efforts made to improve PUE using molecular marker tools. Details on QTLs identified for low P‐stress tolerance in various crop plants are presented. These QTLs can be used to improve PUE in crop plants through MAS and breeding, which may be beneficial to improve the yields under P‐deficient soil. Development of new and improved varieties using MAB will limit the use of non‐renewable fertilizers and improve PUE of key crop plants in low input agriculture.  相似文献