astronomy

Maarten Chrispeels

Maarten Chrispeels is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Maarten Chrispeels rather than just read about it. In short: Maarten Chrispeels (born February 10, 1938) is a Belgian-American plant biologist and Distinguished Professor Emeritus at the University of California, San Diego. He is known for his research on the biosynthesis of storage proteins in legume seeds and for the discovery of water channel proteins (aquaporins) in plants.

Key takeaways

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Reference excerpt

Maarten Chrispeels (born February 10, 1938) is a Belgian-American plant biologist and Distinguished Professor Emeritus at the University of California, San Diego. He is known for his research on the biosynthesis of storage proteins in legume seeds and for the discovery of water channel proteins (aquaporins) in plants. He was elected to the United States National Academy of Sciences in 1996. He is an inaugural fellow of American Society of Plant Biologists. He was awarded Guggenheim Fellowships in 1973.

Early life and education He was born in Kortenberg, Belgium. He studied at the Faculty of Agriculture in Ghent, graduating summa cum laude. In 1960, he moved to the United States to pursue a Ph.D. in Agronomy at the University of Illinois at Urbana-Champaign. He completed postdoctoral research at Michigan State University and Purdue University.

Career In 1967, Chrispeels joined the newly established Department of Biology at UCSD, where he remained for over four decades. His early research focused on the secretion of hydroxyproline-rich glycoproteins in plant cells. He later investigated the biosynthesis and vacuolar targeting of storage proteins in legume seeds, elucidating the role of the Golgi apparatus in protein trafficking. His work contributed to the understanding of how proteins are modified and transported within plant cells. Chrispeels' laboratory was among the first to use transgenic plants to study protein targeting. While researching vacuolar transport signals, he and his colleagues identified aquaporins, membrane proteins that facilitate water movement across cell membranes, a discovery that advanced the field of plant-water relations. From 1996 to 2006, he served as director of the San Diego Center for Molecular Agriculture at UCSD. For 12 years (1999-2011) he served as an advisor to the President of Chile on the Millennium Science Initiative Program and was elected as a foreign correspondent of the Academia Chilena de Ciencias. He was awarded a Doctor Honoris Causa degree by the University of Guelph, Canada. Chrispeels co-founded two biotechnology companies. Phylogix, aimed at developing radioprotective agents for stem cells, ceased operations following funding withdrawal. In 2010, he co-founded Arterra Bioscience with Gabriella Colucci in Italy. The company focused on plant-based skincare products. After Arterra's IPO in 2021, Chrispeels sold his shares and donated the proceeds to establish an endowed professorship in plant biology at UCSD.

Research In the 1980s, Chrispeels collaborated with researchers in Australia and the United States to develop insect-resistant transgenic crops. His work on expressing a bean-derived alpha-amylase inhibitor in peas rendered them resistant to the pea bruchid beetle, marking one of the earliest successful uses of genetic engineering for pest resistance in seeds. Chrispeels has been an advocate for the use of biotechnology in addressing global food security and environmental sustainability. He has emphasized the potential of genetically modified organisms (GMOs) to contribute to sustainable agriculture by enhancing crop yields, improving resistance to pests and environmental stressors, and reducing the reliance on chemical inputs such as pesticides and herbicides. Chrispeels co-authored the textbook Plants, Genes and Crop Biotechnology and produced educational materials translated into multiple languages.

Selected bibliography Martínez, Immaculada M.; Chrispeels, Maarten J. (2003-02-01). "Genomic Analysis of the Unfolded Protein Response in Arabidopsis Shows Its Connection to Important Cellular Processes[W]". The Plant Cell. 15 (2): 561–576. Bibcode:2003PlanC..15..561M. doi:10.1105/tpc.007609. ISSN 1532-298X. PMC 141221. PMID 12566592. Apone, Fabio; Alyeshmerni, Nicole; Wiens, Kathryn; Chalmers, Derek; Chrispeels, Maarten J.; Colucci, Gabriella (2003-10-01). "The G-Protein-Coupled Receptor GCR1 Regulates DNA Synthesis through Activation of Phosphatidylinositol-Specific Phospholipase C". Plant Physiology. 133 (2): 571–579. doi:10.1104/pp.103.026005. ISSN 1532-2548. PMC 219033. PMID 12972659. Apone, Fabio; Alyeshmerni, Nicole; Wiens, Kathryn; Chalmers, Derek; Chrispeels, Maarten J.; Colucci, Gabriella (2003-10-01). "The G-Protein-Coupled Receptor GCR1 Regulates DNA Synthesis through Activation of Phosphatidylinositol-Specific Phospholipase C". Plant Physiology. 133 (2): 571–579. doi:10.1104/pp.103.026005. ISSN 1532-2548. PMC 219033. PMID 12972659. Aroca, Ricardo; Amodeo, Gabriela; Fernández-Illescas, Silvia; Herman, Eliot M.; Chaumont, François; Chrispeels, Maarten J. (January 2005). "The role of aquaporins and membrane damage in chilling and hydrogen peroxide induced changes in the hydraulic conductance of maize roots". Plant Physiology. 137 (1): 341–353. doi:10.1104/pp.104.051045. ISSN 0032-0889. PMC 548864. PMID 15591439. Chrispeels, Maarten J.; Varner, J. E. (1967-03-01). "Gibberellic Acid-Enhanced Synthesis and Release of α-Amylase and Ribonuclease by Isolated Barley and Aleurone Layers". Plant Physiology. 42 (3): 398–406. doi:10.1104/pp.42.3.398. ISSN 0032-0889. PMC 1086548. PMID 16656517. Chrispeels, M J (1976). "Biosynthesis, Intracellular Transport, and Secretion of Extracellular Macromolecules". Annual Review of Plant Physiology. 27 (1): 19–38. doi:10.1146/annurev.pp.27.060176.000315. ISSN 0066-4294. Greenwood, J. S.; Chrispeels, M. J. (September 1985). "Correct targeting of the bean storage protein phaseolin in the seeds of transformed tobacco". Plant Physiology. 79 (1): 65–71. doi:10.1104/pp.79.1.65. ISSN 0032-0889. PMC 1074829. PMID 16664403. Maurel, C.; Reizer, J.; Schroeder, J. I.; Chrispeels, M. J. (1993). "The vacuolar membrane protein gamma-TIP creates water specific channels in Xenopus oocytes". The EMBO Journal. 12 (6): 2241–2247. doi:10.1002/j.1460-2075.1993.tb05877.x. ISSN 0261-4189. PMC 413452. PMID 8508761.

See also List of Guggenheim Fellowships awarded in 1973

References

External links Maarten Chrispeels publications indexed by Google Scholar Chrispeels UCSD Profile

Worked examples

Example 1 — a first encounter with Maarten Chrispeels

Start with the simplest possible case. Write down what Maarten Chrispeels claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Maarten Chrispeels before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Maarten Chrispeels ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Maarten Chrispeels

In research: Maarten Chrispeels appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Maarten Chrispeels in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Maarten Chrispeels is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1938 births, 21st-century American botanists, 21st-century Belgian biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Maarten Chrispeels outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Maarten Chrispeels in 20 minutes

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Frequently asked questions

What is Maarten Chrispeels in simple terms?

Why does Maarten Chrispeels matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Maarten Chrispeels?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Maarten Chrispeels.