Search

To identify genes involved in pigment gland morphogenesis in cotton, gene expression was profiled using genechip (Affymetrix) during pigment gland morphogenesis in cotton variety Xiangmian-18, which has glandless seeds but glanded plants, and a glandless line, N5. The results showed that 303 genes were differentially expressed by a factor greater than two during gland morphogenesis; 59% (180) of these genes shared similarity with known genes in GenBank. These genes play roles in defense response, response to oxidative stress, peroxidase activity, and other metabolic pathways. KOBAS (KEGG Orthology-Based Annotation System) indicate that these genes are involved in 68 biochemical pathways. These findings suggest that the related defense response, gossypol biosynthesis pathway and other complex regulation may be associated with pigment gland morphogenesis in cotton. The results may provide a basis for further study and serve as a guide for related research. [ABSTRACT FROM AUTHOR]

In this paper, we propose a refractive index sensor with self-reference performance based on a two-dimensional grating structure, mainly consisting of periodic arrays of triple layer dielectric nanodisks and a continuous substrate separated by a thin gold film. Three reflection dips are observed and manipulated to realize self-reference and high sensing performance due to the excitation of magnetic dipole mode resonance, substrate mode resonance and metal layer assisted guide mode resonance. These hybrid modes have been explained by the distributions of the electric and magnetic fields in the nanostructure. A detailed analysis of the influences of material thickness on the optical properties of the proposed refractive index sensor is also investigated. Moreover, the proposed refractive index sensor demonstrates a high sensing performance, an important application for future biomedical applications, with a bulk refractive index sensitivity of 672 nm RIU−1 (RIU: refractive index unit) and figure of merit of 1050 RIU−1. Importantly, the function of self-reference is realized simultaneously. Finally, it also shows excellent sensing performance, with the maximum value exceeding 168 000 by measuring the light intensity change in the reflected light at a certain wavelength. This makes it much more suitable for applications in the field of portable detection. [ABSTRACT FROM AUTHOR]