S N Al-Nadhari has completed his PhD in Plant Pathology (Plant Nematology) at College of Food and Agriculture, King Saud University, Saudi Arabia in 2014. H is currently working as Researcher and reviewer in Technology and Innovation Unit in Rector's for Graduate studies & Scientific Research Sciences.
A greenhouse study was conducted to compare the relative efficacy of different approaches to manage Meloidogyne incognita on green bean. These approaches include chemical (fumigant, non-fumigant, seed dressing, and seed dip), biological (the egg-parasitic fungus, Paecilomyces lilacinus and the mycorrhizal fungus Glomus sp.), physical (soil solarization), and cultural (chicken litter and urea) methods. Nine different control materials and application methods were compared. Two important parameters were considered: plant response (plant growth and root galling) and nematode reproduction (production of eggs and the reproduction factor Rf). The results showed that the use of chicken litter as an organic fertilizer severely affected the growth and survival of the seedlings. Therefore, this treatment was removed from the evaluation test. All of the other treatments were found to be effective against nematode reproduction, but with different levels of efficacy. The eight treatments decreased (38.9-99.8%) root galling, increased plant growth and suppressed nematode reproduction. Based on three important criteria, namely, the gall index (GI), egg mass index (EMI), and reproduction factor (RF), the tested materials and methods were categorized into three groups according to their relative control efficacy under the applied test conditions. The three groups were as follows: 1) the relatively high effective group (GI=1.0-1.4, Rf=0.07-0.01), which included the fumigant dazomet, the non-fumigant fenamiphos, soil solarization, and seed dip with 1 fenamiphos; 2) the relatively moderate effective group (GI=3.4-4.0, Rf=0.24-0.60), which included seed dressing with fenamiphos and urea; and 3) the relatively less effective group (GI=5.0, Rf=32.2-37.2), which included Paecilomyces lilacinus and Glomus sp.
Javed Hussain Umrani is working as a PhD scholar at the Biotechnology Research Institute (BRI), Chinese Academy of Agricultural Sciences, Beijing, China. His research experience includes various programs, contributions and participation in different countries for diverse fields of study. His research interests as a researcher reflect him in wide range of publications in various national and international journals.
Drought and high temperature are major environmental factors that severely limit plant productivity worldwide. Agricultural production faces serious threats from frequent extreme weather conditions. Maize (Zea mays L.) is a major crop greatly affected by drought and high temperature in the China and worldwide. Previously expression of ABP9 in transgenic Arabidopsis leads to enhanced tolerance to temperature and oxidative stresses. It is proved that the expression of ABP9 gene maize on the basis of different superior phenotypes for drought tolerance is essential and prerequisite for grain development. In this research, we evaluated ten events of [Pubi-ABP9 (06 construct)] of transgenic maize for drought tolerance at vegetative & reproductive stages under field conditions and identified several phenotypes showed high tolerance to drought. Tolerant construct of [Pubi-ABP9.1 (06 construct)] (611, 616 & 617) at vegetative stage and drought applied during reproductive stage (617& 618) events were able to maintain comparatively adequate phenotypes chlorophyll fluorescence, NDVI, reduced ASI & enough grain yield was recorded compared to the non-transgenic controls. The use of such resources to produce transgenic maize which are able to alleviate the negative impacts of drought stresses on the growth, development and grain yield of maize.