Spermatogenesis in Mnium affine, var. ciliaris (Grev.), C.M.

Electrochemical Evidence of Action of Iaa in Mnium

The effect of 5 -10~ 7 and 5 1 0 « M IAA on K+, Cl" and S 0 4 " " uptake by young and old Mnium gametophytes from 0.2 MM or 10 MM salt solutions has been investigated. These IAA concentrations selectively enhance K+ uptake from 0.2 MM KCl or K2S04 in old gametophytes. IAA up to 1 0 5 M does not affect the membrane potential (P.D.). At 0.2 MM KCl the observed P.D. of —200 to — 220 mV is more neg...

Silicification of developing internodes in the perennial scouring rush (Equisetum hyemale var. affine).

An electron microprobe (EMP) analysis of silica (SiO,) deposition in the epidermis of developing internodes of the perennial scouring rush (Equisetum hyemale var. affine) indicates that SiO, is first detected in the stomata1 apparatus beginning with internode 3, then the epidermal papillae (internode 8), and finally in radial cell walls of the long epidermal cells (internode 10). This process i...

ROTATIONAL ASSIGNMENT OF NEW BANDS IN THE NO , EXCITATION SPECTRUM IN THE SPECTRAL RANGE OF 15600 cm TO 15633 cm

Sub-Doppler excitation spectroscopy in a collimated cold supersonic beam of 5% NO seeded in argon has been performed with a spectral resolution down to 10 MHz for four vibronic bands within the perturbed B ?X A system of NO . The rotational temperature of about 15 K achieved by adiabatic cooling allows the separation of closely lying vibronic bands which overlap in absorption spectra ...

Genotypic Variation for Salinity Tolerance in Cenchrus ciliaris L.

Scarcity of irrigation water and increasing soil salinization has threatened the sustainability of forage production in arid and semi-arid region around the globe. Introduction of salt-tolerant perennial species is a promising alternative to overcome forage deficit to meet future livestock needs in salt-affected areas. This study presents the results of a salinity tolerance screening trial whic...

Chromosomal Abnormality in Men with Impaired Spermatogenesis