Hirschmanniella pomponiensis n. sp. (Nemata: Pratylenchidae), Parasitic on Bulrush, Scirpus robustus Pursh.

Meloidogyne californiensis n. sp. (Nemata: Meloidogyninae), Parasitic On Bulrush, Scirpus robustus Pursh.

Meloidogyne californiensis n. sp. is described and illustrated from bulrush Scirpus robustus in California. LM and SEM studies revealed that this species differs from other known species in the genus Meloidogyne especially by the prominent posterior cuticular protuberances in the female, the distinct shape of the perineal pattern which is marked by one prominent stria in the perineum, indistinc...

A Statistical Approach to the Objective Differenciation of Hirschmanniella oryzae from H. belli (Nemata : Pratylenchidae)

بررسی میزان آرسنیک، جیوه، روی و مس در گیاهان آبزی کارا (Chara sp.)، نی (Phragmites australis)، لویی (Typha latifolia) و پیزور (Scirpus bulrush) در رودخانه دز

در این مطالعه میزان فلزات سنگین آرسنیک، جیوه، روی و مس چهار گونه بومی از گیاهان آبزی دزفول به نام‌های کارا Chara sp.، نی Phragmites australis، لویی Typha latifolia و پیزور Scirpus bulrush در بهار 1393 موردبررسی قرار گرفت. پس از نمونه‌برداری از جنوب رودخانه دز، نمونه‌ها به آزمایشگاه منتقل و با روش‌های استاندارد در اتوکلاو خشک گردیدند و میزان فلزات سنگین ذکرشده در سه بخش ریشه، ساقه و برگ گیاهان ب...

Quantification of oxygen release by bulrush (Scirpus validus) roots in a constructed treatment wetland.

Amount of oxygen released by bulrush (Scirpus validus) roots has been quantified based on the radial oxygen loss (ROL) exhibited by the roots, the number and the length of active lateral roots, and the field plant density. It was found that wetland bulrush contains two types of active lateral roots (showing ROL), viz., laterals of brown and white main roots. The two laterals have distinct oxyge...

Changes in Esophageal Gland Activity During the Life Cycle of Nacobbus aberrans (Nemata: Pratylenchidae).

Electron and light microscopy were used to study the dorsal gland (DG) and the two subventral glands (SvG) of seven developmental phases of Nacobbus aberrans: pre-parasitic second-stage juveniles (J2), parasitic J2, third- (J3) and fourth- (J4) stages, migratory females, young sedentary females, and mature sedentary females. In each developmental phase the level of esophageal gland activity, wa...