Response of Leaf Anatomical Structure and Photosynthetic Characteristics of Winter Turnip Rape (Brassica rapa L.) to Low Temperature before Winter

2017 ◽  
Vol 43 (3) ◽  
pp. 432 ◽  
Author(s):  
Yao-Zhao XU ◽  
Xiu-Cun ZENG ◽  
Fen-Qin ZHANG ◽  
Jia SUN ◽  
Wan-Cang SUN ◽  
...  
Keyword(s):  
Low Temperature ◽  
Brassica Rapa ◽  
Photosynthetic Characteristics ◽  
Anatomical Structure ◽  
Turnip Rape ◽  
Leaf Anatomical Structure

Effects of shading on photosynthetic characteristics and leaf anatomical structure of Emmenopterys henryi seedlings

2019 ◽  
Vol 39 (24) ◽  
Author(s):  
李冬林 LI Donglin ◽  
王火 WANG Huo ◽  
江浩 JIANG Hao ◽  
祝亚云 ZHU Yayun ◽  
金雅琴 JIN Yaqin ◽  
...  
Keyword(s):  
Photosynthetic Characteristics ◽  
Anatomical Structure ◽  
Leaf Anatomical Structure

scholarly journals Limitations in photosynthesis of sugar beets under water deficit and rehydration conditions

2019 ◽  
Author(s):  
Yangyang Li ◽  
Cong Fei ◽  
Jixia Su ◽  
Ningning Liu ◽  
Fuyu Ma ◽  
...  
Keyword(s):  
Water Deficit ◽  
Deficit Irrigation ◽  
Irrigation Treatment ◽  
Photosynthetic Characteristics ◽  
Anatomical Structure ◽  
Limiting Factors ◽  
Saturation Point ◽  
Sugar Beets ◽  
Leaf Anatomical Structure ◽  
Stomatal Limitations

Abstract Background: Limiting factors in photosynthesis includes stomatal limitations, mesophyll limitations, and biochemical limitations, and mesophyll limitations are the leading limiting factors in photosynthesis as shown by many studies. Mesophyll conductance (gm) exerts significant influences on the photosynthetic capacity of crops, playing a decisive role in mesophyll limitations. The limiting factors in photosynthesis for many crops under water deficit and rehydration conditions have been studied, but few studies of this kind on sugar beet can be found. Results: Our study aimed to analyze the dynamic changes of mesophyll limitations, stomatal limitations, and biochemical limitations by examining the influences of water deficit and rehydration on photosynthetic characteristics, electron transport, and leaf anatomical structure. According to the analysis on photosynthetic characteristics, severe deficit irrigation treatment significantly decreased photosynthesis rate, light saturation point, and CO2 saturation point. After rehydration, there was no difference in photosynthetic characteristics between the well irrigated sugar beets and the ones with severe deficit irrigation treatment. The analysis on leaf anatomical structure found that sugar beets dealt with water deficit by increasing leaf (mesophyll) thickness, and the severe deficit irrigation treatment significantly decreased the number of chloroplasts without influencing each one in terms of shape and cross-section area. No significant influence of water deficit was found on the electron transport rate (Jflu) of sugar beets during the process of CO2 assimilation. Conclusions: Therefore, deficit irrigation treatments cannot significantly influence photosynthetic assimilation of sugar beets. The analysis of limitations in photosynthesis showed that the stomatal and biochemical limitations increased while the mesophyll limitations decreased when sugar beets were under water deficit; however, the stomatal and biochemical limitations decreased while the mesophyll limitations increased after rehydration. The photosynthesis of sugar beets was mainly influenced by mesophyll limitations, and the limiting factors changed significantly only for severe deficit irrigation treatment.

Quantification of Leaf Anatomical Structure and Its Application in a C4 Plant, Sorghum

2014 ◽  
Vol 49 (2) ◽  
pp. 173 ◽  
Author(s):  
Gong Yue ◽  
Chen Haimiao ◽  
Jiang Chuangdao ◽  
Shi Lei
Keyword(s):  
Anatomical Structure ◽  
C4 Plant ◽  
Leaf Anatomical Structure

Hysyn100 summer turnip rape

1996 ◽  
Vol 76 (1) ◽  
pp. 127-128 ◽  
Author(s):  
K. C. Falk ◽  
F. M. Stoenescu
Keyword(s):  
Key Words ◽  
Brassica Rapa ◽  
Western Canada ◽  
Turnip Rape ◽  
Cultivar Description ◽  
Canola Quality

Hysyn100 summer turnip rape (Brassica rapa L.) is a canola-quality population-synthetic (Syn1) with high oil and protein contents that is well adapted to the short- and mid-season growing areas of western Canada. Key words: Turnip rape (summer), synthetic, cultivar description

scholarly journals Abundance, species composition and daily pattern of bees visiting field bean, goat’s rue and turnip rape in southern Finland

1995 ◽  
Vol 4 (5-6) ◽  
pp. 473-478 ◽  
Author(s):  
Anna-Liisa Varis
Keyword(s):  
Apis Mellifera ◽  
Species Composition ◽  
Brassica Rapa ◽  
Basic Knowledge ◽  
Large Field ◽  
Field Bean ◽  
Turnip Rape ◽  
Bumblebee Species ◽  
Constant Rate ◽  
Galega Orientalis

Visits of honeybees (Apis mellifera L.) and bumblebees (Bombas spp.) to flowers of field bean (Vida faba L.), goat’s rue (Galega orientalis Lam.) and spring turnip rape (Brassica rapa ssp. oleifera DC.) were studied to get some basic knowledge about the species composition, abundance and daily rhythm of bees visiting these plants. The studies were made under field conditions. Only pollinating specimens were counted. Both on field bean and goat’s rue 44% of the visitors were honeybees, on turnip rape the proportion of honeybees was 96%. Field bean was visited by Bombas subterraneus (L.)/B, hortorum (L.) as well as by B. lucorum (L.). These species were also present on goat’s rue; the most numerous bumblebee species on this plant, however, was B. lapidarius (L.) which was also the only bumblebee species visiting turnip rape. The total number of bees was highest on goat’s rue. The visits of honeybees began on field bean at noon and were most numerous in the afternoon. On goat’s rue, the numbers were smaller in the mornings, whereas turnip rape was visited at a rather constant rate throughout the day. On field bean, the numbers of B. subterraneus/B. hortorum increased and those of B. lucorum decreased towards the afternoon. On goat’s rue, these species were present in the morning and in the afternoon. B. lapidarius was present on goat’s rue during the whole day, but on turnip rape only in the mornings. On the basis of these results and earlier investigations it is concluded that the numbers of natural pollinators are rather low to assure adequate pollination in turnip rape and large field bean areas under the conditions in southern Finland. If the growing of goat’s rue becomes more prevalent, its pollination requirements need further studies.

ACS-C18 summer turnip rape

2010 ◽  
Vol 90 (2) ◽  
pp. 189-190
Author(s):  
K C Falk
Keyword(s):  
Brassica Rapa ◽  
Seed Oil ◽  
Western Canada ◽  
Parent Population ◽  
Turnip Rape ◽  
Meal Protein ◽  
Cultivar Description ◽  
Short Season ◽  
Canola Quality

ACS-C18 summer turnip rape (Brassica rapa L.) is a canola-quality, two-parent population-synthetic (Syn1) cultivar adapted to the short-season growing areas of western Canada. On average, it yielded 17% more than the WCC/RRC checks over three years of testing and has high seed oil and meal protein contents.Key words: Turnip rape (summer), synthetic, cultivar description

The possible role of embryo sac degeneration in yield reduction of summer turnip rape cultivar Candle

1995 ◽  
Vol 75 (3) ◽  
pp. 595-598
Author(s):  
Xiuying Tian ◽  
L. Van Caeseele ◽  
M. J. Sumner
Keyword(s):  
Brassica Rapa ◽  
Seed Set ◽  
Embryo Sac ◽  
Pollen Tubes ◽  
Yield Reduction ◽  
Turnip Rape ◽  
Key Words:Brassica

When pollination occurred within 24 h after anthesis, 69.2% of the pods of Brassica rapa cultivar Candle contained at least 50% fertilized ovules. If pollination occurred later than 4 d after anthesis, an occasional ovule near the base of the pistil was fertilized; however, no significant seed set was observed. Pollen tubes were observed entering the locules of the ovary from pollinations carried out as late as 5 d after anthesis. At 3 d after anthesis, in unpollinated flowers, a general deterioration of the embryo-sac contents began and gradually increased to include integumentary cells by 6 d after anthesis. Some ovules swelled as though they were fertilized, but no embryos were present. The results suggest that yield reductions in this species may occur because of the reduction of fertilization potential through rapid degeneration of embryo sacs following anthesis. Key words:Brassica rapa, embryo sac, yield

scholarly journals Anatomical Structure and Terpenoid Content of Zodia (Evodia suaveolens Scheff) Leaves

2020 ◽  
Vol 20 ◽  
pp. 03001
Author(s):  
Evi Mintowati Kuntorini ◽  
Dewi Nofaliana ◽  
Eny Dwi Pujawati
Keyword(s):  
Vascular Bundle ◽  
Anatomical Structure ◽  
Vascular Bundles ◽  
Oil Glands ◽  
Abaxial Epidermis ◽  
Embedding Method ◽  
Histochemical Assay ◽  
Paraffin Embedding ◽  
Histochemical Test ◽  
Leaf Anatomical Structure

Zodia (Evodia suaveolens Scheff) is a member of Rutaceae contain terpenoids, triterpenoids, alkaloids, flavonoids, and xanthones which have anti-mosquito activity. This research aimed to observe the anatomical structure, the location, and distribution of terpenoid based on the leaves' age. Anatomical slides preparation of leaves were made using the paraffin embedding method with safranin staining. The distribution of terpenoid was analyzed by the histochemical assay. Leaf anatomical structure shows that the 3rd and 6th leaf bifacial (dorsiventral) consisted of the upper epidermis, mesophyll (palisade and sponge), collateral vascular bundle, parenchyma midrib, abaxial epidermis and oil glands in mesophyll that is underneath both epidermises. The diameter of oil glands with larger sizes was on the 6th leaf, whereas the density is not different in the 3rd and 6th leaves. The histochemical test showed that terpenoid was observed in the leaf vascular bundles, oil glands, and epidermis.

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