Endogenous Levels and Transport of 1-Aminocyclopropane-1-Carboxylic Acid in Stamens of <i>Ipomoea nil</i> (Convolvulaceae)

Kiss, Helen Guiragossian; Koning, Ross E.

doi:10.1104/pp.90.1.157

Cited by 13 publications

(12 citation statements)

References 29 publications

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“…We have demonstrated interorgan transport of ACC, as has been previously reported in other systems (3,5,6,9,12,18,21,23,28,29). In shoots, ACC is converted to ethylene, which in turn causes leaf abscission.…”

Section: Water Stress and Leaf Abscission In Citrussupporting

confidence: 53%

“…Xylem transport of ACC from roots to shoots was first demonstrated by Bradford and Yang to induce epinasty in tomato plants subjected to anaerobic root stress (5, 6). Later, interorgan ACC transport was shown in several systems (3,9,12,18,21,23,28,29). However, no studies to test the relationship between water stress-induced abscission and xylem transport of ACC have been made.…”

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confidence: 99%

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1-Aminocyclopropane-1-Carboxylic Acid Transported from Roots to Shoots Promotes Leaf Abscission in Cleopatra Mandarin (Citrus reshni Hort. ex Tan.) Seedlings Rehydrated after Water Stress

Tudela¹,

Primo‐Millo²

1992

Plant Physiol.

135

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The effect of water stress and subsequent rehydration on 1-aminocyclopropane-1-carboxylic acid (ACC) content, ACC synthase activity, ethylene production, and leaf abscission was studied in Cleopatra mandarin (Citrus reshni Hort. ex Tan.) seedlings. Leaf abscission occurred when drought-stressed plants were allowed to rehydrate, whereas no abscission was observed in plants under water stress conditions. In roots of water-stressed plants, a high ACC accumulation and an increase in ACC synthase activity were observed. Neither increase in ACC content nor significant ethylene production were detected in leaves of water-stressed plants. After rehydration, a sharp rise in ACC content and ethylene production was observed in leaves of water-stressed plants. Content of ACC in xylem fluid was 10-fold higher in plants rehydrated for 2 h after water stress than in nonstressed plants. Leaf (2,4,24). The relationship between ethylene production and abscission, both induced by water stress, has also been well established in cotton (11,15) and citrus (4). However, it has been indicated recently that these findings may be artifactual results obtained when working with detached tissues (19,20). These authors concluded that water stress alone cannot induce ethylene synthesis in intact plants.Citrus trees present a characteristic behavior of water stress-induced leaf abscission. When trees are subjected to water stress, leaves are injured but are not abscised. They remain attached until water stress is relieved (by rain or irrigation) and, soon afterwards, they are abscised (1). Similar behavior has been reported in cotton plants (15), which has led us to suggest that during water stress an abscissioninducing factor is synthesized in roots of citrus trees, and later it is transported to the aerial parts of the plant where it induces abscission. Ethylene is the natural regulator of abscission, and due to its gaseous nature, it may be that this abscission-inducing factor is ACC, the metabolic precursor of ethylene. Xylem transport of ACC from roots to shoots was first demonstrated by Bradford and Yang to induce epinasty in tomato plants subjected to anaerobic root stress (5, 6). Later, interorgan ACC transport was shown in several systems (3,9,12,18,21,23,28,29). However, no studies to test the relationship between water stress-induced abscission and xylem transport of ACC have been made. The aim of this work is to study this hypothesis. MATERIALS AND METHODS Plant MaterialEight-to 10-month-old Cleopatra mandarin (Citrus reshni TUDELA AND PRIMO-MILLO flux density, 120 Mmol-s-1 m2. RH was 95% during dark periods and oscillated between 60 and 95% during light periods. Plants were watered three times per week with 300 mL of half-strength modified Hoagland solution. Water Stress TreatmentsWater stress began at the start of the 16-h light period. Well-watered plants were taken from the pots and their roots washed with water. Then, the plants were placed in pots with dry sand for different periods under continuous light. In rehy...

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Section: Water Stress and Leaf Abscission In Citrussupporting

confidence: 53%

mentioning

confidence: 99%

1-Aminocyclopropane-1-Carboxylic Acid Transported from Roots to Shoots Promotes Leaf Abscission in Cleopatra Mandarin (Citrus reshni Hort. ex Tan.) Seedlings Rehydrated after Water Stress

Tudela¹,

Primo‐Millo²

1992

Plant Physiol.

135

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“…Therefore, one can speculate that either another ACC synthase gene is leading to the ethylene responsible for this effect or that the sensitivity of the tissue to ethylene is enhanced (GuzmBn and Ecker, 1990). In addition, the possible interorgan transport of ACC to target tissues cannot be excluded because this phenomenon has been demonstrated in various cases (Amrhein et al, 1982;Fuhrer and Fuhrer-Fries, 1985; Mor et al, 1985; Nichols and Frost, 1985; Kiss and Koning, 1989;Woltering, 1990;Tudela and Primo-Millo, 1992;ONeill et al, 1993).…”

Section: Expression Pattern Of Acsl Changes During Growth In the Darkmentioning

confidence: 99%

“…Hook formation in dark-grown seedlings is known to be ethylene Kiss and Koning, 1989;Woltering, 1990;Tudela and Primo-Millo, 1992;ONeill et al, 1993).…”

Section: Expression Pattern Of Acslmentioning

confidence: 99%

The Arabidopsis 1-Aminocyclopropane-1-Carboxylate Synthase Gene 1 Is Expressed during Early Development.

et al. 1993

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The temporal and spatlal expression of one member of the Arabidopsis 1-aminocyclopropane-1-carboxylate (ACC) synthase gene family (ACS7) was analyzed using a promoter-P-glucuronidase fusion. The expression of ACSl is under developmental control both in shoot and root. High expression was observed in young tissues and was switched off in mature tissues. ACS7 pmmoter activity was strongly correlated with lateral root formation. Dark-grown seedlings exhibited a different expression pattern from light-grown ones. The ACC content and the in vivo activity of ACC oxidase were determined. ACC content correlated with ACS7 gene activity. ACC oxidase activity was demonstrated in young Arabidopsis seedlings. Thus, the ACC formed can be converted into ethylene. In addition, ethylene production of immature leaves was fourfold higher compared to that of mature leaves. The possible involvement of ACSl in influencing plant growth and development is discussed. INTRODUCTIONEthylene is involved in several aspects of plant development from germination and seedling growth to flowering, fruit ripening, leaf abscission, and organ senescence. It also plays a key role in the response to environmental factors (Abeles, 1973; Yang and Hoffman, 1984; Moore, 1989; Van Der Straeten and Van Montagu, 1991).With the recent cloning of genes encoding the two most important enzymes in the biosynthesis of ethylene, l-aminocyclopropane-1-carboxylate (ACC) synthase (Nakajima et al., 1990; Van Der Straeten et al., 1990; Dong et al., 1991;Huang et al., 1991; Olson et al., 1991; and ACC oxidase (ethylene-forming enzyme or EFE) (Hamilton et al., 1990; Spanu et al., 1991;Wang and Woodson, 1991), more information about the molecular regulation of the synthesis of this hormone has been made available. The main focus has been on the regulation of ACC synthase gene expression because of its key regulatory role in the pathway. This implies that diverse inducers of ethylene production are also inducers of de novo synthesis of ACC synthase (Yang and Hoffmann, 1984; Van Der Straeten and Van Montagu, 1991).ACC synthases have been cloned from tomato (Van Der Straeten et al., 1990; Olson et al., 1991; To whom correspondence should be addressed.Yip et al., 1992), winter squash (Nakajima et al., 1990), zucchini (Huang et al., 1991), Arabidopsis (Liang et al., 1992; Van Der Straeten et al., 1992), mung bean (Botellaet al., 1992; Kim et al., 1992), carnation (Park et al., 1992), orchid (ONeill et al., 1993), tobacco (Bailey et al., 1992), and apple (Dong et ai., 1991; Kim et al., 1992). In several cases, it has been shown that ACC synthase genes belong to a multigene family and that they are differentially responsive to various ethyleneinducing factors and conditions such as wounding, fruit ripening, and auxins, although in certain cases some leve1 of coordination was demonstrated (Nakajima et al., 1990; Van Der Straeten et al., 1990; Dong et al., 1991; Olson et al., 1991; ; Yip et ai., 1992). These studies have provided information about general aspects of AC...

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“…This is particularly evident between whorls two and three, the corolla and stamens (Erickson 1948;Goldberg et al 1993;Greyson 1994;Kiss & Koning 1989;Koltunow et al 1990;Minter & Lord 1983;Scott et al 1991), where the correlation can result from developmental processes at several levels. For example, some substances produced in the anther are transferred to the corolla and other whorls, where they in£uence corolla expansion and various other processes (Erickson 1948;Minter & Lord 1983;Mohan Ram & Rao 1984;Raab & Koning 1988).…”

Section: Introductionmentioning

confidence: 99%

Evolution of meiosis timing during floral development

Johnston

1999

Proc. R. Soc. Lond. B

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Meiosis divides the haploid and diploid portions of the life cycle in all sexual organisms. In angiosperms meiosis occurs during £ower development, the duration of which varies widely among species and is a¡ected by environmental conditions within species. For 36 species representing 13 angiosperm families, we determined the time at which meiosis ceased in the anthers as a fraction of the total time from £oral primordium initiation (beginning of development) to £ower opening (end). It was found that this fraction, rather than being continuously distributed among species, occurred in three discrete classes despite wide variations within and among species in absolute developmental durations. Each species was characterized by a single timing class. For all species within a given timing class, therefore, the durations before and after the end of microsporocyte meiosis existed in constant ratio. Each timing class was found in phylogenetically distant species; conversely, a plant family often contained more than one class. Timing class was not related to ploidy level, in£orescence architecture, pollination syndrome or mating system. These ¢ndings show that either the durations before and after microsporocyte meiosis are regulated by the same exogenous process, or one duration determines the other. They further imply that the underlying developmental processes have evolved in a limited number of ways among £owering plants.

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Endogenous Levels and Transport of 1-Aminocyclopropane-1-Carboxylic Acid in Stamens of Ipomoea nil (Convolvulaceae)

Cited by 13 publications

References 29 publications

1-Aminocyclopropane-1-Carboxylic Acid Transported from Roots to Shoots Promotes Leaf Abscission in Cleopatra Mandarin (Citrus reshni Hort. ex Tan.) Seedlings Rehydrated after Water Stress

1-Aminocyclopropane-1-Carboxylic Acid Transported from Roots to Shoots Promotes Leaf Abscission in Cleopatra Mandarin (Citrus reshni Hort. ex Tan.) Seedlings Rehydrated after Water Stress

The Arabidopsis 1-Aminocyclopropane-1-Carboxylate Synthase Gene 1 Is Expressed during Early Development.

Evolution of meiosis timing during floral development

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