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Saturday, August 8, 2020 | History

2 edition of Reflections on synthesis of abscisic acid in water-stressed leaves found in the catalog.

Reflections on synthesis of abscisic acid in water-stressed leaves

Oliver S. Achwanya

Reflections on synthesis of abscisic acid in water-stressed leaves

by Oliver S. Achwanya

  • 26 Want to read
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Published by Egerton University College in Njoro, Kenya .
Written in English


Edition Notes

Statementby Oliver S. Achwanya.
SeriesResearch paper series / Egerton University College ;, no. 8 (Aug. 1986), Research paper series (Egerton University College) ;, no. 8.
Classifications
LC ClassificationsMLCM 90/00418 (S)
The Physical Object
Pagination6 leaves ;
ID Numbers
Open LibraryOL2181599M
LC Control Number88980061

Abstract I suggest that action potentials, which occur in most, if not all, plants, play a major role in intercellular and intracellular communication. Long‐distance communication is achieved through the transmitted changes in membrane potential, whereas local signalling is achieved through changes in the subcellular localization of ions (K +, Cl −, and Ca 2+) and of water, and perhaps by. This book details sorghum breeding technologies, grain compounds, nutrition and digestibility, biotechnology methods, broad renewable applications and an economic study. Chapters are divided into five review chapters, five case study chapters, and nine protocol chapters providing comprehensive reviews, new study results or state-of-the-art.

The current project addresses ozone impacts on vegetation, the effects of these impacts on other aspects of the environment (perchlorate contamination, carbon sequestration, regulation of water use), and the environmental costs and benefits of growing tall tropical grasses such as sugarcane, energy cane, and sorghum as dedicated biofuel feedstocks (greenhouse gas emission, water consumption. This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation.

Full text of "Selected water resources abstracts" See other formats. McAdam, SAM and Brodribb, TJ, Mesophyll cells are the main site of abscisic acid biosynthesis in water-stressed leaves, Plant Physiology, , (3) pp. ISSN () [Refereed Article].


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Reflections on synthesis of abscisic acid in water-stressed leaves by Oliver S. Achwanya Download PDF EPUB FB2

Abscisic acid (ABA) plays a major role in plants' responses to biotic and abiotic stresses; increases in ABA levels have been reported during salt, cold, drought exposure, and wounding (Zeevaart and Creelman, ; Peña-Cortés et al., ; Shinozaki and Yamaguchi-Shinozaki, ).ABA affects plant resistance to heat exposure (Robertson et al., ) and plant-pathogen interaction (Mohr and Cited by: Abstract.

Synthesis and movement of abscisic acid (ABA) into the apoplast of water-stressed cotton (Gossypium hirsutum L.) leaves were examined using pressure dehydration exudates of leaves dehydrated in a pressure chamber contained by: Abstract.

Abscisic acid (ABA) (Fig. 1) was discovered independently by several groups in the early s. Originally believed to be involved in the abscission of fruit and dormancy of woody plants, the role of ABA in these processes is still not : Steven H.

Schwartz, Jan A. Zeevaart. Intact plants of Xanthium strumarium L. were subjected to a water stress-recovery cycle. As the stress took effect, leaf growth ceased and stomatal resistance increased.

The mature leaves then wilted, followed by the half expanded ones. Water, solute, and pressure potentials fell steadily in all leaves during the rest of the stress period.

After 3 days, the young leaves lost turgor and the Cited by:   Abstract. The interrelationship among water‐stress‐induced abscisic acid (ABA) accumulation, the generation of reactive oxygen species (ROS), and the activities of several antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) was investigated in leaves of detached maize (Zea mays L.) plants Cited by: Role of Abscisic Acid in Water Stress-induced Antioxidant Defense in Leaves of Maize Seedlings Article (PDF Available) in Free Radical Research 36(9) October with Reads.

Qin X, Zeevaart JAD () The 9-cis-epoxycarotenoid cleavage reaction is the key regulatory step of abscisic acid biosynthesis in water-stressed bean. Proc Natl Acad Sci USA OpenUrl Abstract / FREE Full TextCited by:   When excised, light-grown leaves of Hordeum vulgare were fed with (±)-[C]-abscisic acid and stressed until they had lost 12% of their original fresh weight, marked changes in the distribution of radioactivity between abscisic acid and its catabolites were observed.

Wilted leaves were less able than their turgid counterparts to transform (±)-[C]-abscisic acid into 2′-hydroxymethyl Cited by: 5. Abscisic acid is a C sesquiterpene compound (molecular formula C 15 H 20 O 4) com­posed of three isoprene residues and having a cyclohexane ring with keto and one hydroxyl group and a side chain with a terminal carboxylic group in its structure.

Plant Breeding Institute, Maris Lane, Trumpington, Cambridge, CB2 2LQ, U.K. Abscisic Acid Accumulation in Detached Cereal Leaves in Response to Water Stress II. Effects of Leaf Age and Leaf Position S.

QUARRIE and I. HENSON With 2 figures Received October 3, Cited by: There was a linear relationship between the amount of water stress and the amount of after-effect on transpiration of the leaves. The abscisic acid content of the leaves increased between and.

The accumulation of abscisic acid (ABA) was investigated in detached leaves of cultivars of pearl millet (Pennisetum americanum [L.] Leeke), rice (Oryza sativa L.), and wheat (Triticum aestivum L.) which were partially millet and rice leaves stressed to a 10 per cent loss of fresh weight, ABA levels attained their maximum amounts 2 h after desiccation, and declined markedly when Cited by:   Abstract.

The pathway of biosynthesis of abscisic acid (ABA) can be considered to comprise three stages: (i) early reactions in which small phosphorylated intermediates are assembled as precursors of (ii) intermediate reactions which begin with the formation of the uncyclized C 40 carotenoid phytoene and end with the cleavage of 9′‐ cis ‐neoxanthin (iii) to form xanthoxal, the C 15 Cited by: Root herbivory did not lead to a jasmonate‐dependent response in the leaves, but specifically triggered water loss and abscisic acid (ABA) accumulation.

The induction of ABA by itself was partly responsible for the induction of leaf defenses, but not for the resistance against S. by: Abiotic stress is one of the severe stresses of environment that lowers the growth and yield of any crop even on irrigated land throughout the world.

A major phytohormone abscisic acid (ABA) plays an essential part in acting toward varied range of stresses like heavy metal stress, drought, thermal or heat stress, high level of salinity, low temperature, and radiation by: Signalling process of water stress‐induced abscisic acid (ABA) accumulation was investigated in maize (Zea mays L.) leaf and root free‐radical scavengers and reducing agents, N‐acetyl cysteine (NAC) and cystein (Cys), significantly inhibited or nearly.

ABA can also be induced in vegetative tissues when exposed to WDS. Hence to correlate ABA synthesis with water deficit stress in vegetative tissues, ABA was isolated from leaves of N22 rice seedlings grown in phytotron at 10, 25 and 40 Days After Planting (DAP) under control (RWC > 90%) as well as water deficit stress (RWC = %) condition.

ABA concentration in leaves under control and WDS. Physiologically, abscisic acid (ABA) is believed to be a general inhibitor of plant growth, including during the crucial early development of seedlings.

However, this view contradicts many reports of stimulatory effects of ABA that, so far, have not been considered in the debate concerning ABA’s function in plant development. To address this apparent contradiction, we propose a hypothetical Cited by: Abscisic acid (ABA) is involved in several responses to plant water deficits, including an important role in root growth maintenance.

Studies of the ABA-deficient maize mutant viviparous 14 (vp14) showed that ABA-deficiency under water deficit conditions causes impaired primary root growth, which was associated with excess production of ethylene and also a dramatic increase in intracellular.

Effect of ethylene perception inhibitor on growth, water relations, and abscisic acid content in wheat plants under water deficit. Russian Journal of Plant Physiology [ Links ] Sharp, R.E. Interaction with ethylene: Changing views on the role of abscisic acid in Cited by:.

Start studying Chap Biology. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. water-stressed tomato plant? Auxins, Gibberellins, Cytokinins Abscisic Acid spray late in the season. Abscisic acid 1. ABSCISIC ACID 2. CONTENTS Introduction History Chemical composition Occurrence and distribution Biosynthesis ABA transport in plant ABA signal transduction pathway Role of Abscisic Acid Conclusion References 5/12/ 3 3.

INTRODUCTION 4. HISTORY 5.Abscisic acid (ABA) is well known as a stress hormone and Water stress-induced abscisic acid accumulation in relation to reducing agents and sulfhydryl modifiers in maize plant W. JIA* & J.

ZHANG mmol s–1 m–2, before they were immediately water stressed. For .