Preliminary investigations into the significance of floral applications of calcium, boron and polyphenols for increased seed set in confection sunflowers (Helianthus annuus L.)

Vaknin, Yiftach; Barr, N.; Saranga, Yehoshua

doi:10.1016/j.fcr.2008.02.001

Cited by 5 publications

(7 citation statements)

References 21 publications

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“…Even under optimal honeybee activity in nonoilseed sunflower crops relatively large proportions (15-50%) of seeds can remain empty. The same problem has also been found in oilseed sunflowers but on a smaller scale [4].…”

Section: Introductionmentioning

confidence: 73%

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Effect of Boron Foliar Application on Reproductive Growth of Sunflower (Helianthus annuusL.)

AL-Amery

Hamza

Fuller

2011

International Journal of Agronomy

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A study was carried out to determine the response of open pollinated sunflower (Helianthus annuus L. cv. Shumos) to boron fertilizer. Spring and autumn grown plots were sprayed with boron (0, 50, 100, 150, 200, and 250 mg L −1 ) in a randomized complete block design. The results showed that boron and green Leaf area/LAI measured at the end of seed filling were linearly related in the spring crop. In the autumn crop, the relationship between boron and dry matter yield was linear, and applications above 100 mg L leading to significant reductions in empty seed percentage. Seed yield increased linearly in the autumn crop in response to boron, and 200 and 250 mg L −1 applications gave significant increases in yield compared to the control.

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Section: Introductionmentioning

confidence: 73%

“…Empty seeds are primarily located in the proximal (central) and distal (peripheral) regions of the capitulum [4]. It has been suggested that the empty seeds result from several unrelated factors including boron deficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of Boron Foliar Application on Reproductive Growth of Sunflower (Helianthus annuusL.)

AL-Amery

Hamza

Fuller

2011

International Journal of Agronomy

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“…In addition, the length of the ovary and style represents the minimum distance traveled by pollen tubes to affect fertilization and, presumably, the greater the distance traveled by pollen tubes the less chance of fertilization occurring, and this barrier is exacerbated by limited pollen available per stigmatic surface during self‐pollination. Segala et al (1980) showed that large amounts of pollen are often associated with high SF. George (1982) reported in sunflower that style length varied considerably among genotypes and SF was inversely proportional to style length.…”

Section: Discussionmentioning

confidence: 99%

“…Clearly, there may be other physiological factors that affect SF in sunflower. For example, Segala et al (1980) showed that cultivars with light pollen agglutination normally had better SF. George (1982) suggested that genotypes with high levels of self‐pollination were observed to have a high number of florets per unit area, a random orientation of stigmas, and the stigma receptive surface vertically presented.…”

Section: Discussionmentioning

confidence: 99%

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Factors Controlling Self‐Fertility in Sunflower: The Role of GCA/SCA Effects, S Alleles, and Floret Characteristics

et al. 2012

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Self-fertility (SF) is an essential trait that contributes to yield stability in sunflower {Helianthus annuus L.), particularly in the absence of pollinating insects. We used a full-diallel design with 12 sunflower parents, including confectionary and nonconfectionary types, to assess (i) combining ability for SF, (ii) the relationship between SF and other traits, and (iii) microsatellite markers for tracking self-incompatible S alíeles. Twelve parents and their 132 F,s were evaluated for SF in two environments. Self-fertility was correlated with final seed length (r = -0.57, P < 0.01), suggesting that SF was possibly influenced by floret characteristics. A genetic analysis of SF showed that both general combining ability (GCA) and specific combining ability (SCA) were significant, although after seed length was used as a covariate, the contribution of SCA effects increased to 65% of the variance and narrow-sense heritability was almost zero. The SCA effects were in part explained by the interaction of various combinations of S alíeles. These results suggest that for programs targeting high-SF confectionary sunflower it would be difficult to predict the SF of hybrids based on the performance of their parents; therefore. F., hybrid evaluation would be necessary. Our study suggested that factors controlling SF included GCA/SCA effects, S alíeles, and floret characteristics. It also demonstrated the value of combining molecular and quantitative genetics for elucidating the inheritance of a complex trait.

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Optimization of Pollen Germination Medium and Pollen Collection in Two Japanese Strawberry Cultivars

Yamaguchi,

Yamazaki,

Akutsu

2024

Hortic J

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Strawberries, the most economically well-known berry crop, are known for their taste, nutritional value, and antioxidant compounds. Various spatiotemporal or seasonal factors are known to affect the strawberry pollen germination rate; however, determinating which factor most influences the variation in the pollen germination rate remains challenging. This study aimed to determine the optimal pollen germination media and pollen short-term storage methods in the Japanese strawberry cultivars 'Shindai SUS-1' and 'Shindai BS8-9'. Each strawberry pollen was incubated for 3 h in the dark on a solid medium with 1.5% agar and different sucrose and boric acid concentrations. The pollen germination rate was then investigated. The optimal pollen germination medium for both cultivars was 1.5% agar, 10% sucrose, and 0.1% boric acid. The small amount of strawberry pollen used in this study was collected immediately after flowering in the morning. Therefore, we also investigated a method for collecting a large amount of pollen while maintaining pollen activity. For both cultivars, the pollen germination rate for dry pollen, incubated for 24 h with silica gel after the petals and calyx were removed, was the same as that of the fresh pollen collected immediately after flower collection. In addition, dry pollen was more efficient in terms of short-term storage than fresh pollen. For 'Shindai BS8-9', the germination rate for dry pollen was also higher than that of the fresh pollen when stored in vacuum at −25, 4, 15, 20, and 25°C for 3 and 7 days.

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Preliminary investigations into the significance of floral applications of calcium, boron and polyphenols for increased seed set in confection sunflowers (Helianthus annuus L.)

Cited by 5 publications

References 21 publications

Effect of Boron Foliar Application on Reproductive Growth of Sunflower (Helianthus annuusL.)

Effect of Boron Foliar Application on Reproductive Growth of Sunflower (Helianthus annuusL.)

Factors Controlling Self‐Fertility in Sunflower: The Role of GCA/SCA Effects, S Alleles, and Floret Characteristics

Optimization of Pollen Germination Medium and Pollen Collection in Two Japanese Strawberry Cultivars

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