Pollen wall

The larvae of Balaustium izmirensis Noei & Ersin sp. nov. were obtained by rearing adults collected from building walls and window ledges in Bornova, İzmir, Turkey. The larva of B. izmirensis Noei & Ersin sp. nov. is described and illustrated. A key to larval species of Balaustium is provided.

13p dolomite36 30-12-2021 3 0   Download

Pectin is a major component and structural polysaccharide of the primary cell walls and middle lamella of higher plants. Pectate lyase (PEL, EC 4.2.2.2), a cell wall modification enzyme, degrades de-esterified pectin for cell wall loosening, remodeling and rearrangement. Nevertheless, there have been few studies on PEL genes and no comprehensive analysis of the PEL gene family in cotton.

14p vitzuyu2711 29-09-2021 7 1   Download

Genic male sterility (GMS) line is an important approach to utilize heterosis in Brassica rapa, one of the most widely cultivated vegetable crops in Northeast Asia. However, the molecular genetic mechanisms of GMS remain to be largely unknown.

23p visilicon2711 20-08-2021 11 1   Download

Expansins (EXPs) facilitate non-enzymatic cell wall loosening during several phases of plant growth and development including fruit growth, internode expansion, pollen tube growth, leaf and root development, and during abiotic stress responses.

12p vijichea2711 28-05-2021 8 1   Download

Pectins are a group of structurally complex plant cell wall polysaccharides whose biosynthesis and function remain poorly understood. The pectic polysaccharide rhamnogalacturonan-I (RG-I) has two types of arabinogalactan side chains, type-I and type-II arabinogalactans. To date few enzymes involved in the biosynthesis of pectin have been described.

17p vihashirama2711 21-05-2020 13 0   Download

During sexual reproduction, pollen grains land on the stigma, rehydrate and produce pollen tubes that grow through the female transmitting-tract tissue allowing the delivery of the two sperm cells to the ovule and the production of healthy seeds.

15p vishikamaru2711 25-04-2020 8 0   Download

Switchgrass is C4 perennial grass species that is being developed as a cellulosic bioenergy feedstock. It is wind-pollinated and considered to be an obligate outcrosser. Genetic engineering has been used to alter cell walls for more facile bioprocessing and biofuel yield.

10p vihamax2711 21-04-2020 13 0   Download

The study reveals that the plants grown in hothouse conditions showed considerable variation in the production of flowers and seeds. Flowering occurs from the second week of September to late October, with 20 days of peak flowering. Anthers dehisced longitudinally between 7:30 and 11:00 AM, strongly dependent on higher temperature.

8p vibasque27 27-03-2019 11 0   Download

Air pollution induces abnormality in anthers, reduction of pollen grains’ umbers and male sterility. Anthers of Spartium junceum L. (Spanish broom) were collected at different stages of development from control (less polluted) and polluted areas (mainly SO2, NO2, CO, hydrocarbons (HCs) and airborne particulate material (APM)). Structure and development of anther walls and pollen grains were studied and compared.

9p vibasque27 29-03-2019 26 0   Download

Expansins are a family of proteins that catalyze pHdependent long-term extension of isolated plant cell walls. They are divided into two groups, a and b, the latter consisting of the grass group I pollen allergens and their vegetative homologs. Expansins are suggested to mediate plant cell growth by interfering with either structural proteins or the polysaccharide network in the cell wall.

10p research12 01-06-2013 26 3   Download

Chính kết quả này đã dẫn đến khái niệm “thành bao phấn” (wall factor), nó giúp cho nhiều nhà nghiên cứu sử dụng “ hiệu ứng bảo mẫu” (nursing effect) của bao phấn hoàn chỉnh để phát triển sinh sản đơn tính ở các hạt phấn phân lập cuả nhiều loài. Dịch chiết của bao phấn cũng có tác dụng kích thích sản xuất phôi hạt phấn (Pollen embryo) Các nghiên cứu về mô học đã xác định vai trò của nhân tố thành bao phấn trong việc phát triển phôi hạt phấn. Một số kết quả nghiên cứu...

21p poseidon02 16-07-2011 157 31   Download