The effect of abscisic acid on sugar levels in seedlings of Phaseolus vulgaris L. cv. redland pioneer

Karmoker, JL; Steveninck, R. F. M. Van

doi:10.1007/bf00381251

Cited by 43 publications

(16 citation statements)

References 27 publications

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“…Since dry weight accumulation in the elongating region of hypocotyls was reduced over that found in wellwatered plants (Fig. 3C), ABA causes a redistribution of assimilates from hypocotyls to roots ( 18).…”

Section: Exogenous Abscisic Acid and Water Deficit Cause Similar Chanmentioning

confidence: 87%

Water Deficit and Abscisic Acid Cause Differential Inhibition of Shoot versus Root Growth in Soybean Seedlings

et al. 1990

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Roots often continue to elongate while shoot growth is inhibited in plants subjected to low-water potentials. inhibited by transfer to low-water potential vermiculite or exogenous ABA. Both treatments affected growth and dry weight in a similar fashion. Maximum inhibition of hypocotyl growth occurred when intemal ABA levels (modulated by ABA application) reached the endogenous level found in the elongating zone of seedlings grown in water-deficient vermiculite. Conversely, root growth was affected to only a slight extent in low-water potential seedlings and by most ABA treatments (in some, growth was promoted). In every seedling section examined, transfer of seedlings into lowwater potential vermiculite caused ABA levels to increase approximately 5-to 10-fold over that found in well-watered seedlings. Changes in soluble sugar content, polysome status, and polysome mRNA translation products seen in low-water potential seedlings did not occur with ABA treatments sufficient to cause significant inhibition of hypocotyl elongation. These data suggest that both variation in endogenous ABA levels, and differing sensitivity to ABA in hypocotyls and roots can modulate root/shoot growth ratios. However, exogenous ABA did not induce changes in sugar accumulation, polysome status, and mRNA populations seen after transfer into low-water potential vermiculite.

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Section: Exogenous Abscisic Acid and Water Deficit Cause Similar Chanmentioning

confidence: 87%

Water Deficit and Abscisic Acid Cause Differential Inhibition of Shoot versus Root Growth in Soybean Seedlings

et al. 1990

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“…In bean roots, ABA increased the reducing sugar content three-fold (6), and in grapefruit chilling-resistance was positively correlated with ABA and sugar content in the peel (7). ABA pretreatment in Nicotiana pith explants resulted in an increase in proline content upon chilling, and a Carbohydrates clearly are involved in the response of chillingsensitive plants to low temperatures, but it is not certain, as yet, whether carbohydrates confer resistance directly by modulating and stabilizing membranes, or whether they are needed simply as precursors for the synthesis of metabolites such as proline (12,29), glutathione (15), NADPH (11,16,21), or ATP (20), all of which have been implicated in providing chilling tolerance in sensitive tissue.…”

Section: Discussionmentioning

confidence: 99%

Role of Carbohydrates in Diurnal Chilling Sensitivity of Tomato Seedlings

King¹,

Joyce²,

Reid³

1988

Plant Physiol.

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Tomato seedlings (Lycopersicon esculentum Mil.) chilled starting at different times during the light/dark cycle were most chilling-sensitive at the end of the dark period (Al King, MS Reid, BD Patterson 1982 Plant Physiol 70: 211-214 (27,29). Water stress, which increased the sugar and proline levels, also increased the freezing tolerance of young citrus trees (28). Exogenous carbohydrates have been used to impart freezing resistance. Tillering wheat nodes could be hardened in the dark by treating with a 10% sucrose solution (25), and excised stem segments of Cornus stolonifera could be hardened by supplying them with sucrose (3).There is increasing, although circumstantial, evidence that carbohydrate content also influences chilling sensitivity. Although the mechanism of chilling injury is still unclear, chilling injury is very distinct from freezing injury, and the physiological events leading to each are believed to be unrelated. Dark treatment of cotton seedlings (16) and other chilling-sensitive species (10)

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“…However, promotive effects of ABA in sink tissues have now been reported. ABA enhanced sugar content in roots of intact bean plants, possibly by stimulating sugar transport from the shoot to the root (11). In some cases, applications of ABA to ears of wheat (7) and barley (22) have stimulated 14C assimilate transfer from the flag leaf to the ear.…”

Section: Abstracrmentioning

confidence: 99%

Abscisic Acid and Its Relationship to Seed Filling in Soybeans

Schussler¹,

Brenner²,

Brun³

1984

Plant Physiol.

134

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ABSTRACrThe effect of exogenous abscisic acid (ABA) on the rate of sucrose uptake by soybean (Glycine max L. Men.) embryos was evaluated in an in vitro system. In addition, the concentrations of endogenous ABA in seeds of three soybean Plant Introduction (PI) lines, differing in seed size, were commpared to their seed growth rates. ABA (10-molar) stimulated in vitro sucrose uptake in soybean (cv 'Cly') embryos removed from plants grown in a controled environment chamber, but not in embryos removed from field-grown plants of the Sink strength describes the capacity ofan organ to accumulate photoassimilates, and is the product of sink size and sink activity (25). Plant hormones are probably involved in determining both sink size and sink intensity. While cytokinins, gibberellins, and auxins generally promote growth processes, ABA has most often been considered an inhibitory substance (24). However, promotive effects of ABA in sink tissues have now been reported. ABA enhanced sugar content in roots of intact bean plants, possibly by stimulating sugar transport from the shoot to the root (11). In some cases, applications of ABA to ears of wheat (7) and barley (22) have stimulated 14C assimilate transfer from the flag leaf to the ear. However, King and Patrick (12) saw no stimulation of 14C transport to wheat ears after injection of ABA into the grains. Correlations between rate of growth and ABA accumulation in major sinks have been reported for wheat (13,14), grapes (5), pea (3), bean (10), and soybeans (4, 15). The relatively high levels (up to 12.2 #g g-' fresh weight) (15) and timing of ABA accumulation in soybean seeds (1,4,15) suggest a role in seed growth above simply preventing precocious germination. Browning (3) found that ABA accumulated more rapidly in a lare-seeded pea line and suggested a role for ABA in controlling cotyledon enlargement during linear seed fill. It has also been suggested that ABA may stimulate phloem unloading (8, 18) by decreasing the proton motive force across the sieve tube plasmalemma. The embryo-seed coat interface of the soybean seed (21) In addition, the endogenous ABA concentrations of seed coats, cotyledons, and embryonic axes of three field-grown soybean PI lines differing in seed size were compared to their seed growth rates during filling. MATERIALS AND METHODSGrowth Chamber Study. Plant Culture. Variety 'Clay' soybeans (Group 00 maturity) were grown in a controlled environment chamber in 1-L plastic pots in a 1.5:1.5:1 (v/v/v) mixture of vermiculite, peat, and sand. Pots were watered twice daily with automatic drip irrigation and given 250 ml of Peters 20-20-20 (200 ppm) twice weekly. A 14-h photoperiod with a 25/19C day/night temperature regime was provided. The photosynthetic photon flux density at the top of the canopy was 800 jE m-2 s-1.In Vitro Sucrose Uptake. During mid pod fill (seed dry weight 40% of final seed dry weight) pods were removed. Seed coats were surgically removed from a number of seeds and groups of three embryos were placed in 15 ml of sterile 10 ...

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The effect of abscisic acid on sugar levels in seedlings of Phaseolus vulgaris L. cv. redland pioneer

Cited by 43 publications

References 27 publications

Water Deficit and Abscisic Acid Cause Differential Inhibition of Shoot versus Root Growth in Soybean Seedlings

Water Deficit and Abscisic Acid Cause Differential Inhibition of Shoot versus Root Growth in Soybean Seedlings

Role of Carbohydrates in Diurnal Chilling Sensitivity of Tomato Seedlings

Abscisic Acid and Its Relationship to Seed Filling in Soybeans

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