Stem-swelling and photosynthate partitioning in stem mustard are regulated by photoperiod and plant hormones

Xu, Zhen; Wang, Qiaomei; Guo, Yanping; Guo, Danlu; Shah, Ghazanfar Ali; Liu, Hailin; Mao, Aining

doi:10.1016/j.envexpbot.2007.08.001

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…They also promote the biomass production [17,57] of vegetative parts by fostering DNA, RNA, and protein synthesis [58][59][60], ribose, and polyribosome multiplication [61] and improving enzyme activity [62] and membrane permeability [63]. The latter may have a role in the improvement of the uptake and use of mineral nutrients [64][65][66][67] and the transport of photosynthates [68,69], hence explaining the higher efficiency of GA 3 -treated seedlings against control seedlings. The accumulation of the assimilates in the leaves, but most of all their transport in the stems, was another effect that characterized the GA 3 -treated seedlings fed with the higher fertigation rates and that determined a higher shoot/root ratio with 2 g L −1 of fertilizer.…”

Section: Discussionmentioning

confidence: 99%

Fertigation Management and Growth-Promoting Treatments Affect Tomato Transplant Production and Plant Growth after Transplant

et al. 2020

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Plant biostimulants are of interest as they can stimulate plant growth and increase resource utilization. There is still no information on the use of plant growth-promoters under variable nutritional conditions in the nursery and the effects on tomato seedling growth and plant performance after transplant. This study aimed to evaluate the suitability of gibberellic acid (GA3) or bacterial biostimulant treatments to enhance the growth and quality of greenhouse-grown tomato (Solanum lycopersicum ‘Marmande’) seedlings, fertigated with increasing nutrient rates and to assess the efficacy of these treatments on the early growth of tomato plants. During autumn 2019, tomato seedlings were inoculated with 1.5 g L−1 of TNC BactorrS13 (a commercial biostimulant containing 1.3 × 108 CFU g−1 of Bacillus spp.) or sprayed with 10−5 M GA3 and fertigated with a nutrient solution containing 0, 1, 2 and 4 g L−1 of NPK fertilizer (20-20-20) when they reached the 11th BBCH growth stage for tomato. Subsequently, the seedlings were evaluated in greenhouse cultivation for 60 days until at least the 61st BBCH growth stage (January 2020). The growth of the tomato seedlings increased curvilinearly in relation to the fertigation rates. The GA3-treated seedlings showed similar or even higher growth parameters than the control seedlings fed with 4 g L−1 of fertilizer but with half of the nutrients. The inoculation of the substrate with Bacillus spp. had negative effects in the absence of fertigation but determined a greater growth at the highest fertigation rate. The bacterial inoculum of seedlings had longer-term effects than the GA3 treatment during the plant growth, but these effects were noticeable mainly when the bacterial biostimulant was associated with the highest fertigation rate.

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Section: Discussionmentioning

confidence: 99%

Fertigation Management and Growth-Promoting Treatments Affect Tomato Transplant Production and Plant Growth after Transplant

et al. 2020

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“…However, Abbas (2013) illustrated that GA3 decreased significantly vascular bundles thickness and vascular units diameter of Dillplant (Anethum graveolens L) under water stress. Also, Agamy (2004) and Xu et al (2008) investigated the effect of some growth regulators on the anatomical characters of several plants and found a pronounce effects on thickness of epidermis and cortex and number and diameter of vascular bundles in sweet fennel. Under water stress, Bahrami et al (2013) illustrated that the leaves thickness and xylem width could be considered key structural features of leaves that manage the ability of a safflower genotype to tolerate water deficit stress.…”

Section: -14 2014 -15mentioning

confidence: 99%

Seed pre-soaking on Gibberellic acid (GA3) enhance growth, histological and physiological traits of sugar beet (Beta vulgaris L.) under water stress Enas, S. Ibrahim Botany Department, Faculty of Agriculture, Suez Canal University, 41522 Ismailia, Egypt

Azab

2018

Egypt. J. Agron.

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T HE PRESENT study aimed to evaluate the effect of three levels of gibberellic acid solutions (50, 100 and 150 mg/L) on two sugar beet cultivars. (Farida and Sultan) under three field capacity (50 , 75 and 100%). This experiment was carried out at the Experimental Farm, Faculty of Agriculture, Suez Canal University, Ismailia, during the two growing successive seasons of 2013/14 and 2014/15. Results showed that all GA3 tested treatments statistically improved growth parameters, i.e., number of leaves, fresh and dry weights of leaves/plant, as well as, root yield, sucrose%, photosynthetic pigments (chlorophylls a, b and carotenoids), relative water content (RWC), leaf osmotic pressure (LOP) and the studied anatomical characters (thickness of mysophyll, thickness of midrib, thickness of palisade tissue, thickness of spongy tissue, average number of xylem vessels/vascular bundle, thickness of vascular bundle, thickness of collenchaymatous tissue and upper epidermis). Conclusively, this study indicates that, soaking seeds in GA3 solutions especially at 150 mg/L can decrease the effects of drought on growth and yield of sugar beet.

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“…ZR is the main active form of cytokinin; thus, cytokinin is a key factor influencing the grazing tolerance of ryegrass. Several researchers have also reported that as a plant hormone, cytokinin promotes plant growth (Choi and Hwang 2007;Xu et al 2008;San-oh et al 2006;Madhaiyan et al 2006).…”

Section: Cytokinin and Grazing Tolerancementioning

confidence: 97%

Effects of the coordination mechanism between roots and leaves induced by root-breaking and exogenous cytokinin spraying on the grazing tolerance of ryegrass

Wang

Liu

2011

J Plant Res

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The grazing tolerance mechanism of ryegrass was investigated by examining the effects of roots on leaves under frequent defoliation. The study consisted of four treatments: (1) with root breaking and cytokinin spraying, (2) root breaking without cytokinin spraying, (3) cytokinin spraying with no root breaking, and (4) no root breaking and no cytokinin spraying. Results showed that root breaking or frequent defoliation inhibited the ryegrass regrowth, which resulted in low biomass of the newly grown leaves and roots, as well as low soluble carbohydrate content and xylem sap quantity in the roots. Spraying with exogenous cytokinin promoted the increase in newly grown leaf biomass, but decreased root biomass, root soluble carbohydrate content, and root xylem sap quantity. Determination of gibberellic acid, indole-3-acetic acid, abscisic acid, and zeatin riboside (ZR) in roots, newly grown leaves, and stubbles showed that cytokinin is a key factor in ryegrass regrowth under frequent defoliation. Root breaking and frequent defoliation both decreased the ZR content in roots and in newly grown leaves, whereas spraying with exogenous cytokinin increased the ZR content in roots and in newly grown leaves. Therefore, cytokinin enhances the above ground productivity at the cost of root growth under frequent defoliation.

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Stem-swelling and photosynthate partitioning in stem mustard are regulated by photoperiod and plant hormones

Cited by 19 publications

References 35 publications

Fertigation Management and Growth-Promoting Treatments Affect Tomato Transplant Production and Plant Growth after Transplant

Fertigation Management and Growth-Promoting Treatments Affect Tomato Transplant Production and Plant Growth after Transplant

Seed pre-soaking on Gibberellic acid (GA3) enhance growth, histological and physiological traits of sugar beet (Beta vulgaris L.) under water stress Enas, S. Ibrahim Botany Department, Faculty of Agriculture, Suez Canal University, 41522 Ismailia, Egypt

Effects of the coordination mechanism between roots and leaves induced by root-breaking and exogenous cytokinin spraying on the grazing tolerance of ryegrass

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