An Aphelenchoides sp. nematode Parasitic of Polianthes tuberosa in the Mekong Delta.
نویسندگان
چکیده
Polianthes tuberosa is a commercially valuable flower crop in the Mekong Delta of Vietnam that is propagated by the harvesting and planting of bulbs. The cultivation of P. tuberosa is complicated by an endemic nematode infection that damages a high proportion of the plants. Based on morphological criteria and ribosomal RNA gene sequencing, we have determined that the infection is caused by an Aphelenchoides sp. nematode and is most likely Aphelenchoides besseyi. By scoring various parts of harvested plants with flowers for the presence of viable nematodes over a period of six months, we determined that the nematode is an ectoparasite that can survive the intercrop periods, especially in the bulbs that are used to plant new crops. A comparison of farming practices in the Mekong Delta failed to identify useful control methods, but rather indicated that fields that have cultivated P. tuberosa for the longest periods suffer the worst damage from the nematode infection. Finally, we demonstrated that the nematode is capable of infecting 30 rice cultivars but does not cause the white tip disease usually associated with A. besseyi infection.
منابع مشابه
Observations on the Foliar Nematode, Aphelenchoides besseyi, Infecting Tuberose and Rice in India.
The foliar nematode Aphelenchoides besseyi causes white tip disease in rice (Oryza sativa L.) and floral malady in tuberose (Polianthes tuberosa L.). This nematode is widely distributed in the rice fields of many states of India, including West Bengal (WB), Andhra Pradesh (AP), Madhya Pradesh (MP) and Gujarat (GT). In order to generate information on intraspecific variations of A. besseyi as we...
متن کاملTitle of Article: Studies on the Distribution of Plant-parasitic Nematodes Associated with Pineapple in Delta, Imo and Cross River states of Nigeria Authors: Fisayo Daramola and Steven Afolami
Background: Plant-parasitic nematodes are important pests of horticultural crops causing damage and significant reduction in the crop yield of pineapple. A survey was conducted to determine the types, frequency and population distribution of plant-parasitic nematodes associated with pineapple in some pineapple-producing states in Nigeria. A total of 30 farms were sampled from Delta, Imo, and Cr...
متن کاملتاثیر تیمار پرولین بر برخی خصوصیات مورفولوژیکی، فیزیولوژیکی و افزایش عمر پس از برداشت گل شاخه بریده مریم Polianthes tuberosa L .))
Tuberosa (Polianthes tuberosa L.) is one of the most important cut flowers in Iran and word wide which the increment of postharvest life of this flower is very important. In this research proline as an antioxidant compound was used in 0(control), 1 and 10 micro molar concentrations and the effects of this compound on some morphological and physiological characteristics and vase life of tuberosa...
متن کاملEmbryogenesis in Polianthes tuberosa L var. Simple: from megasporogenesis to early embryo development
The genus Polianthes belongs to the subfamily Agavoideae of the Asparagaceae family formerly known as Agavaceae. The genus is endemic to México and comprises about 15 species, among them is Polianthes tuberosa L. The aim of this work was to study and characterize the embryo sac and early embryo development of this species in order to generate basic knowledge for its use in taxonomy, in vitro fe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of nematology
دوره 39 3 شماره
صفحات -
تاریخ انتشار 2007