EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Digestion of lettuce lactuca sativa in rats observed by scanning electron microscopy






Nutrition Reports International 21(5): 681-688

Digestion of lettuce lactuca sativa in rats observed by scanning electron microscopy

Fresh lettuce (L. sativa) and its surface digestive patterns in rats were observed by scanning electron microscopy. Photomicrographs of fresh lettuce leaves showed irregularly shaped cells with small randomly oriented stomata on adaxial and abaxial surfaces. Cross sections revealed random dispersions of vascular tissue and undifferentiated mesophyll. Digestion began in the stomach with cuticular and vascular tissue separation by action of hydrochloric acid. Intact mesophyll cells became distorted and compacted. Cell wall decomposition was not evident in duodenal or jejunal samples but continued cuticular sloughing was observed. Bacteria became evident on lettuce mesophyll surfaces of ileal samples. Mesophyll was separated from vascular tissue with further compaction and some degradation of the primary cell walls of exposed tracheal tubes from ileal and cecal samples. Continued digestion of these primary cell walls occurred in the large intestine with phloem separation and increased bacterial population but no apparent digestion of residual plant surfaces. Sloughed cuticle, disrupted tracheal tubes and compressed mesophyll were present in feces. [Fiber sources vary in their extent to aid in digestion and function and structure appear to be interrelated.].


Accession: 005161573



Related references

Harbers, L.H.; George, J.R.; Reeves, R.D., 1980: Digestion of lettuce in rats observed by scanning electron microscopy. Fresh lettuce (Lactuca sativa) and its surface digestive patterns in rats were observed by scanning electron microscopy. Photomicrographs of fresh lettuce leaves showed irregularly shaped cells with small randomly orientated stomata on adaxial and...

Savage, W.B.rry, W.; Reed, C., 1981: Effects of trace element stress on the morphology of developing seedlings of lettuce (Lactuca sativa L. Grand Rapids) as shown by scanning electron microscopy. Journal of plant nutrition(1-4): 129-138

George J.R.; Reeves R.D.; Harbers L.H., 1978: Digestion of fiber in rats as observed by scanning electron microscopy. Federation Proceedings 37(3): 756

George J.R.; Harbers L.H.; Reeves R.D., 1979: Digestion of wheat bran in rats as observed by scanning electron microscopy. Federation Proceedings 38(3 PART 1): 767

Harbers, C.A.Z.; Harbers, L.H., 1983: Asparagus tissue changes by cooking methods and digestion in rats as observed by scanning electron microscopy. Adult male rats were given asparagus which was raw or had been cooked by boiling or by microwave. Asparagus remnants in gastrointestinal contents showed that the only cellular rupture in the upper tract was cellular separation by stomach hydrochlo...

Johari O., 1977: Scanning electron microscopy 1977 vol 1 proceedings of the 10th annual scanning electron microscope symposium and workshops on materials and component characterization quality control with the scanning electron microscopy scanning transmission electron microscopy scanning electron microscopy application to semi conductors analytical electron microscopy biological specimen preparation for scanning electron microscopy chicago illinois usa march 28 april 1 1977. This first volume of a 2-vol. set contains all papers presented at the symposium and the following workshops: analytical electron microscopy [including scanning transmission electron microscopy (STEM), X-ray microanalysis, cathodoluminescence and...

Ester, A.; Brantjes, N.B.M., 1998: Pelleting the seed of iceberg lettuce (Lactuca sativa L.) and butterhead lettuce (Lactuca sativa L. var. capitata L.) with imidacloprid to control aphids. In a field experiment in 1994-95 in Netherlands, iceberg lettuce (Lactuca sativa) and butterhead lettuce (L. sativa var. capitata) seeds were pelleted with imidacloprid. Iceberg lettuce seeds were treated with 800 g imidacloprid/kg seed and butter...

Verhoyen, M.; Matthieu, J.L., 1980: Generalized infection of lettuce (Lactuca sativa L. 'capitata') and cos lettuce (Lactuca sativa L. 'romana') by two viruses during the 1979 season. Plants of both types of lettuce became heavily infected with lettuce mosaic and cucumber mosaic viruses as a result of rapid multiplication of aphids. Head lettuce plants were mainly infected by CMV, cos lettuce by both viruses. Lettuce seed was a...

Harbers C.A.Z.; Harbers L.H., 1983: Asparagus asparagus officinalis tissue changes by cooking methods and digestion in rats as observed by scanning electron microscopy. Scanning electron microscopy was used to observe fresh asparagus and the changes in tissue structure when it was cooked by boiling and microwave. Boiling distorted parenchymal tissues; microwave cooking produced cracks and distorted adjacent tissu...

Harbers, C.; Harbers, L., 1983: Asparagus tissue changes by cooking methods and digestion in rats as observed by scanning electron microscopy Asparagus officinalis. Nutrition reports international 27(1): 97-101