Role of tillers in the development of the ear and kernel in sweet corn.

分蘖在甜玉米穗和籽粒发育中的作用。

• 批准号: 09660020
• 负责人: OGIWARA Isao
• 金额: $ 2.5万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09660020/
• 关键词: Sweet corn; Tiller; Partitioning of dry matter; Ear development; Time of pollen shedding; スイ-トコーン; サイトカイニン

Two or three tillers frequently develop at the base of the main plant in sweet corn. In this study, the dry matter production of plants with tillers (PT) and plants with tiller removed (PTR) was compared to find out the role of tillers in the development of the ear and kernel in sweet corn. Sweet corn cv. Honey Bantam 36 and Peater Wase No.1 were used for experimental purposes.The ear weight of a PT was larger than that of a PTR, 32 and 28 days after the silk appearance in Honey Bantam 36 and Peater Wase No.1, respectively. The increase of ear weight in PT was related, not only to some assimilates produced by tillers which are translocated to ear of the main plan, but also to the photosynthetic ability of the main plant remainning constantly high in the grain filling.Next, shedding time and viability of pollen from tassel florets of tillers were investigated. The pollen from tassel florets of tillers had viability for pollination /fertilization and the shedding time lasted from 8 to 15 after the silk appearance. It seemed that the pollen play a role in the decrease of unfertilized grains at the tip of an ear.We concluded that the tiller could influence on the translocation of current photosynthates to the ear, the senescence of leaves on the main plant, and the pollination/fertilization of florets at the tip of an ear.

甜玉米的主株基部经常会长出两个或三个分蘖。在这项研究中，比较了有分蘖植物（PT）和无分蘖植物（PTR）的干物质产量，以找出分蘖在甜玉米穗和籽粒发育中的作用。甜玉米品种Honey Bantam 36 和 Peater Wase No.1 用于实验目的。Honey Bantam 36 和 Peater Wase No.1 分别在吐丝后 32 天和 28 天，PT 的穗重大于 PTR 的穗重。 PT期间穗重的增加不仅与分蘖产生的一些同化物转移到主株穗有关，而且与主株在灌浆过程中保持较高的光合能力有关。接下来，对分蘖雄花花粉的脱落时间和活力进行了研究。分蘖雄穗花的花粉具有授粉/受精活力，吐丝后脱落时间为8～15℃。花粉似乎在穗尖未受精籽粒的减少中发挥了作用。我们得出结论，分蘖可能影响当前光合产物向穗的转移、主株叶片的衰老以及穗尖小花的授粉/受精。

项目成果

荻原 勲他3名: "スイートコーンの雌穂先端部頴果の登熟における品種比較について" 園芸学会雑誌. 65・4. 761-767 (1997)

Isao Ogihara等3人：“甜玉米穗尖成熟的品种比较”日本园艺学会杂志65・4（1997）。

萩原 勲他3名: "スイ-トコーンの雌穂先端部穎果の登熟における品種比較について" 園芸学会雑誌. 65・4. 761-767 (1997)

Isao Hagiwara等3人：“甜玉米穗尖成熟的品种比较”日本园艺学会杂志65・4（1997）。

荻原 勲 他3名: "スイートコーンの雌穂先端部穎果の登熟における品種比較について" 園芸学会雑誌. 65・4. 761-767 (1997)

Isao Ogihara等3人：“甜玉米穗尖成熟的品种比较”日本园艺学会杂志65・4（1997）。

Ogiwara, I., Y.Takura, I.Shimura and K.Ishihara: "Varietal differences in grain filling at the distal end of sweet corn ear." J.Japan.Soc.Hort.Sci. 65 (4). 761-767 (1997)

Ogiwara, I., Y.Takura, I.Shimura 和 K.Ishihara：“甜玉米穗末端籽粒灌浆的品种差异。”