The effect of plant hormones on pollen germination and pollen tube growth of almond cultivars

Radović, A.; Nikolić, D.; Milatović, D.; Živković, Bogovid; Stevanović, Nikola

doi:10.17660/actahortic.2016.1139.65

Cited by 11 publications

(7 citation statements)

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“…These substances may play a role in mediating signal pathways which may subsequently affect cell wall formation, regulate gene expression patterns and induce protein synthesis during pollen germination [37,38]. Plant hormones are one of the most important factors affecting pollen germination [39,40]. In addition to pollen germination, plant hormones can also influence the growth of pollen tubes [41].…”

Section: Discussionmentioning

confidence: 99%

Metabolomic Analysis of Pollen Grains with Different Germination Abilities from Two Clones of Chinese Fir (Cunninghamia lanceolata (Lamb) Hook)

Fragallah

Wang

et al. 2018

Molecules

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Pollen grains produce certain metabolites, which can improve or inhibit germination and tube growth. Metabolomic analysis of germinating and growing Chinese fir pollen has not been reported. Therefore, this study aimed to analyse metabolites changes, content and expression in the germinating pollen of Chinese fir. To understand the metabolic differences, two clones from Chinese fir were selected. Metabolomics analyses were performed on three stages (1-, 24- and 48-h) during in vitro pollen germination. The metabolites profiles at different time points were analyzed by using liquid chromatography-mass spectrometry. The results showed that 171 peaks were screened; the corresponding differential metabolites of 121 peaks were classified into nine types of substances. The expression of metabolites showed significant differences across and between clones, and the variation was evident at all germination stages. The expression was obvious at the early stage of germination, which differed clearly from that of the late stage after pollen tube growth. Moreover, the metabolites were mainly enriched in 14 metabolic pathways. Pollen germination and tube growth and metabolites expressions changed per incubation time. Since this work is preliminary, we suggest further investigations to understand the relationship between the differential metabolites and pollen development, and factors affecting pollen germination process.

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Section: Discussionmentioning

confidence: 99%

Metabolomic Analysis of Pollen Grains with Different Germination Abilities from Two Clones of Chinese Fir (Cunninghamia lanceolata (Lamb) Hook)

Fragallah

Wang

et al. 2018

Molecules

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“…In vitro pollen germination and tube growth are affected by nutrients and plant growth regulators (Maita et al 2015, Muengkaew et al 2016. Proper application of nutrients and regulators is an effective method to promote pollen germination and tube growth (Lin et al 2017, Naik et al 2016, Radovic et al 2016, and is also beneficial for fruit production (Gao et al 2012). Nevertheless, only a few studies have examined the effects of nutrients and regulators application on the promotion of pollen germination and on the increase of the rate of fruit set of C. oleifera (Gao et al 2012, Tan et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal test design for optimizing culture medium for in vitro pollen germination of interspecific oil tea hybrids

Zhao

Yuan

et al. 2021

An. Acad. Bras. Ciênc.

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Oil Tea (Camellia oleifera) is an important woody edible oil plant in China. Oil Tea suffers from low rate of fruit set during production, which is related to poor pollination and fertilization. Pollen vigor is directly related to pollination and fertilization. Using the interspecifi c hybrid Y3 (C. grijsii × C. oleifera) as plant material, we studied the effects of sucrose, H 3 BO 3 , MgSO 4 , and IAA on pollen germination using an orthogonal design to determine the best culture medium. Results indicated that pollen germination rates were signifi cantly affected by medium components and ranged from 29.13% to 56.84%. Pollen tube length was the longest in the T5 medium surpassing the control group by 489.36 μm. MgSO 4 turned out to be the most important germination medium component having great effect on the pollen germination rate. The optimal culture medium to promote pollen tube growth of Oil Tea Y3 was: 1% agar, 150 g•L-1 sucrose, 0.15 g•L-1 H 3 BO 3 , 0.07 g•L-1 MgSO 4 , and 0.01 g•L-1 IAA. The results of this paper may provide information for foliar application of Mg and IAA, which can improve pollen tube growth of Oil Tea in practice.

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“…The reason for this variable response is unknown. Earlier studies have already reported year-to-year variation in almonds [ 54 ], black wattle [ 55 ], chestnuts [ 56 ], and pine [ 57 ]. In our case, we observed some freezing temperatures a few days prior to the first flower sampling date on 19 April 2020.…”

Section: Discussionmentioning

confidence: 99%

Novel Metrics to Characterize In Vitro Pollen Tube Growth Performance of Apple Cultivars

Roeder

Serra

Musacchi

2021

Plants

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In vitro germination assays are frequently used in screening trials to evaluate the pollen viability of pollinizers. To be effective, screening trials must have defined threshold criteria, from which individuals can then be assessed. However, despite decades of research on pollen viability, no established threshold is available to categorize apple cultivars based on their in vitro pollen tube lengths. This study aimed to identify and characterize the subgroups of cultivars based on their pollen tube growth performance. In vitro pollen tube lengths of 41 individuals were determined by incubating samples on artificial germination media at 15 and 25 °C. A six-number summary statistic was calculated, and hierarchical clustering on principal component (HCPC) analysis was used to determine and characterize subgroups. Furthermore, a decision tree model was used to predict class membership for future datasets. HCPC analysis partitioned the 41 individuals into three subgroups with different performances. The decision tree quickly predicted the cluster membership based on the second quartile at 15 °C and the third quartile at 25 °C. The thresholds from the decision tree can be used to characterize new observations. The use of the methods will be demonstrated using a case study with 29 apple accessions.

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The effect of plant hormones on pollen germination and pollen tube growth of almond cultivars

Cited by 11 publications

References 11 publications

Metabolomic Analysis of Pollen Grains with Different Germination Abilities from Two Clones of Chinese Fir (Cunninghamia lanceolata (Lamb) Hook)

Metabolomic Analysis of Pollen Grains with Different Germination Abilities from Two Clones of Chinese Fir (Cunninghamia lanceolata (Lamb) Hook)

Orthogonal test design for optimizing culture medium for in vitro pollen germination of interspecific oil tea hybrids

Novel Metrics to Characterize In Vitro Pollen Tube Growth Performance of Apple Cultivars

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