The Chlamydomonas mex1 mutant shows impaired starch mobilization without maltose accumulation

This study aimed to characterize protein, oil, starch and soluble sugar mobilization as well as the activity of alpha-amylase during rosewood seed germination. Germination test was carried out at 25°C and the following parameters were analyzed: percentage of germination, initial, average, and final germination time. Seed reserve quantification was monitored in quiescent seeds and during different stages of radicle growth. Starch mobilization was studied in function of a-amylase activity. Germination reached 87.5% at the initial, average, and final time of 16, 21 and 30 days, respectively. Oil mobilization showed a negative linear behavior, decreasing 40% between the first and the last stage analyzed, whereas protein levels increased 34.7% during the initial period of germination. Starch content (46.4%) was the highest among those of the metabolites analyzed and starch mobilization occurred inversely to the observed for soluble sugars; alpha-amylase activity increased until the 15th day, a period before radicle emission and corresponding to the highest starch mobilization. The high percentage of rosewood seed germination may be related to the controlled condition used in the germination chamber as well as to high seed reserve mobilization, in special oil and starch.

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Effect of Excess Nickel on Starch Mobilization in Germinating Rice Grains

Journal of Plant Nutrition ◽

10.1080/01904160600830225 ◽

2006 ◽

Vol 29 (8) ◽

pp. 1405-1412 ◽

Cited By ~ 9

Author(s):

Yu Ching Lin ◽

Ching Huei Kao

Keyword(s):

Rice Grains ◽

Starch Mobilization

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Analysis of Non-Structural Carbohydrates and Xylem Anatomy of Leaf Petioles Offers New Insights in the Drought Response of Two Grapevine Cultivars

International Journal of Molecular Sciences ◽

10.3390/ijms21041457 ◽

2020 ◽

Vol 21 (4) ◽

pp. 1457 ◽

Cited By ~ 2

Author(s):

Rachele Falchi ◽

Elisa Petrussa ◽

Enrico Braidot ◽

Paolo Sivilotti ◽

Francesco Boscutti ◽

...

Keyword(s):

Water Stress ◽

Drought Stress ◽

Stress Response ◽

Stress Responses ◽

Cabernet Sauvignon ◽

Drought Response ◽

Xylem Anatomy ◽

Anatomical Analysis ◽

Starch Mobilization ◽

Xylem Conduits

In grapevine, the anatomy of xylem conduits and the non-structural carbohydrates (NSCs) content of the associated living parenchyma are expected to influence water transport under water limitation. In fact, both NSC and xylem features play a role in plant recovery from drought stress. We evaluated these traits in petioles of Cabernet Sauvignon (CS) and Syrah (SY) cultivars during water stress (WS) and recovery. In CS, the stress response was associated to NSC consumption, supporting the hypothesis that starch mobilization is related to an increased supply of maltose and sucrose, putatively involved in drought stress responses at the xylem level. In contrast, in SY, the WS-induced increase in the latter soluble NSCs was maintained even 2 days after re-watering, suggesting a different pattern of utilization of NSC resources. Interestingly, the anatomical analysis revealed that conduits are constitutively wider in SY in well-watered (WW) plants, and that water stress led to the production of narrower conduits only in this cultivar.

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Inhibition of Gibberellic Acid-induced Starch Mobilization by Salicylhydroxamic acid in Avena fatua L. Seed

Annals of Botany ◽

10.1093/oxfordjournals.aob.a087314 ◽

1987 ◽

Vol 59 (3) ◽

pp. 265-268 ◽

Cited By ~ 2

Author(s):

MAHESH K. UPADHYAYA

Keyword(s):

Gibberellic Acid ◽

Avena Fatua ◽

Salicylhydroxamic Acid ◽

Starch Mobilization

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Smoke-water, karrikinolide and gibberellic acid stimulate growth in bean and maize seedlings by efficient starch mobilization and suppression of oxidative stress

South African Journal of Botany ◽

10.1016/j.sajb.2015.06.015 ◽

2016 ◽

Vol 102 ◽

pp. 4-11 ◽

Cited By ~ 6

Author(s):

T.O. Sunmonu ◽

M.G. Kulkarni ◽

J. Van Staden

Keyword(s):

Oxidative Stress ◽

Gibberellic Acid ◽

Maize Seedlings ◽

Starch Mobilization ◽

Smoke Water

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244 EFFECT OF PHOTOPERIOD ON NET CARBON ASSIMILATION AND PARTITIONING IN WHITE POTATO

HortScience ◽

10.21273/hortsci.29.5.464e ◽

1994 ◽

Vol 29 (5) ◽

pp. 464e-464

Author(s):

G.W. Stutte ◽

N.C. Yorio ◽

R.M. Wheeler

Keyword(s):

Starch Content ◽

Carbon Assimilation ◽

Dark Cycle ◽

Short Term ◽

Response Curves ◽

White Potato ◽

Starch Concentration ◽

Kennedy Space Center ◽

Starch Mobilization ◽

Kennedy Space

Photoperiod treatments were imposed on potato (Solanum tuberosum L. cv. Norland) grown in the Biomass Production Chamber (BPC) at Kennedy Space Center under HPS lamps (670 μmol m-2s-1 PPF) at 1200 μmol mol-1 CO2. Stand A decreased with dark cycle length, which correlated with the change in leaf starch concentration during the dark cycle, but not absolute starch concentration. A series of growth chamber experiments were performed to characterize the effect of photoperiod and PPF on CO2 assimilation and starch mobilization in single leaves. Plants grown on a 12/12 photoperiod at either low (300 μmol m-2s-1) or high (600 μmol m-2s-1) PPF were subjected to short-term photoperiod treatments of 8/16, 16/8, and 24/0 and diurnal CO2 assimilation rates, CO2 response curves, and leaf starch content were determined. CO2 compensation point was not affected by either photoperiod or PPF. However, Amax (when normalized for PPF) decreased with increasing photoperiod. Anet correlated with the changes in specific leaf weight and starch content during the dark cycle.

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